3 questions.

1: If you complete all the normal training missions with every weapon you get a helmet that gives you capacity up. It's an often used item in custom armor bow sets. For the rest rapid charge (focus) is also good because you charge your bows faster. The shot boosting skills (normal, pellet and pierce) also influence the bow shots (rapid = normal, pierce = pierce and spread = pellet). Element attack up can also be a usefull skill (especially for bows) if the monster is weak enough to that particular element. I haven't really fought much with bows in high rank but look for armors that give these skills. This is pretty monster specific most of the times though. If you're fighting a monster where pierce shots are more useful, having an armor with rapid S up won't come in handy. Also for some bows the shot that you would unlock with capacity up could be a worse shot than the shots you have available.

2: With evade +2 you still need to roll at the right time. It's not enough to just roll, you have to time it correctly as well. During normal rolls (without evade) you have a tiny window of time where you could roll to not get hit by an attack. This is very difficult to do most of the times so with evade +1/+2 they increase the time window a bit. Evade +1 or +2 makes you invulnerable during a small window of time which is imo much more usefull than rolling further. The narga S armor with the conga U bracers gives evade inc iirc.

3: You don't HAVE to learn to fight with every weapon type in order to complete the game (hell you can complete the game by using only one type), but it can be much easier and especially faster to kill certain monsters with a certain weapon type compared to other types. The reason you can't do anything with a GS or a HBG is because you're probably using them wrong. They can be some of the most destructive weapons in the game if you know how to fight with them. I suggest you read Mazereon's bowgun compendium and watch some of his vids to learn more about using HBG. I recommend you do the same thing for GS.

quote gogengantes

1: If you complete all the normal training missions with every weapon you get a helmet that gives you capacity up. It's an often used item in custom armor bow sets. For the rest rapid charge (focus) is also good because you charge your bows faster. The shot boosting skills (normal, pellet and pierce) also influence the bow shots (rapid = normal, pierce = pierce and spread = pellet). Element attack up can also be a usefull skill (especially for bows) if the monster is weak enough to that particular element. I haven't really fought much with bows in high rank but look for armors that give these skills. This is pretty monster specific most of the times though. If you're fighting a monster where pierce shots are more useful, having an armor with rapid S up won't come in handy. Also for some bows the shot that you would unlock with capacity up could be a worse shot than the shots you have available.

I did not know about the normal/pellet/pierce skills with bows. This will be... Grizzly.

quote gogengantes

2: With evade +2 you still need to roll at the right time. It's not enough to just roll, you have to time it correctly as well. During normal rolls (without evade) you have a tiny window of time where you could roll to not get hit by an attack. This is very difficult to do most of the times so with evade +1/+2 they increase the time window a bit. Evade +1 or +2 makes you invulnerable during a small window of time which is imo much more usefull than rolling further. The narga S armor with the conga U bracers gives evade inc iirc.

I know about the small window and I know I did it properly. I try using the invulnerability thing but I have NEVER survived a mono/diablos charge by that. The charges never hit me otherwise because I am completely out of the way and this will probably be easier if I get more distance.

quote gogengantes

3: You don't HAVE to learn to fight with every weapon type in order to complete the game (hell you can complete the game by using only one type), but it can be much easier and especially faster to kill certain monsters with a certain weapon type compared to other types.

This is why I want to at least get decent at them, I tried gunning a HR Khezu and a gaoren. Easy! Tried using anything else... Failed horribly. Tried meleeing a Tigrex and a Lunastra. Easy! Try gunning them, you know what. Never mind.

quote gogengantes

The reason you can't do anything with a GS or a HBG is because you're probably using them wrong. They can be some of the most destructive weapons in the game if you know how to fight with them. I suggest you read Mazereon's bowgun compendium and watch some of his vids to learn more about using HBG. I recommend you do the same thing for GS.

Great ideas, I will try these out. Well, as soon as I find internet again.

quote Rathalos_123_mhfu

3.Your a hr3 fighter in nekhoth 7* who wants to master all weapon tiers? I haven't seen a guy so determined!
But tbh, Great swords are one of the best weapons in this game, but what I learned was that all the weapon types in this game are balanced, use anything, if you have a HH member on your team online your lucky, you don't need any skill except flute expert. GS has 3 charges low med hi, the thing I think you need practice is rolling/evading attacks, heavy weapons? Dodge!

Point taken. I understand that dodging is important but to dodge you have to get distance. I can dodge but a dodge is not enough to dodge something, you have to get some distance by walking too, I can dodge a Diablos with the sns because I can take 3 steps and then dodge to evade the charge fully, if I try to just press X it will not be far enough and he will run me over. I try to dodge and I love it! hahaha.
Edit: I just noticed that I might be able to use a GS if I get Evade inc. Thanks for linking it together for me!

quote blackomega34

I know about the small window and I know I did it properly. I try using the invulnerability thing but I have NEVER survived a mono/diablos charge by that. The charges never hit me otherwise because I am completely out of the way and this will probably be easier if I get more distance.

try using it in fight with Narga. It will be more help than for mono/diablos. for mono/diablos charge, it is easier to use evade up

quote blackomega34

This is why I want to at least get decent at them, I tried gunning a HR Khezu and a gaoren. Easy! Tried using anything else... Failed horribly. Tried meleeing a Tigrex and a Lunastra. Easy! Try gunning them, you know what. Never mind.

yeah it is hard, really hard, but still doable...

quote blackomega34

I am desperate to master every weapon class but I find the HBG and the GS giant pieces of trash (I cant kill a kut ku with the crimson goat or the blue claw blade) and cannot kill anything save a mosswine and a gaoren with the HBG (None of them can kill you and dont ever move so I dont need to dodge. (died by a giadrome because of low mobility)
Should I practice with these weapons or should I cast them aside and take out my new, shiny anything that is not a GS or HBG?

try watching Nijiao's GS charge guide in youtube. there should be:
1. "requirement" on the GS raw to flinch the enemy in every rank (for some rank)
2. "GS charging guide - tricks and fact-
3. Charge guide on Narga, Tigrex, Rajang, Plesioth, White Fatalis, Rathalos, and Teostra

should be enough to start using GS...
ah... and I hope you already understand when you take your 1st GS to battle. the weapon is not meant to be use like SnS. the mobility is low, that's why when you use it, you need to sheath it back every after use.
that's why the one which is most useful tactic in GS is Unsheath Charge-> monster flinch (not a problem even if it is not flinched) -> sheath back.

GS is meant to be sheath more often than not

quote Rathalos_123_mhfu

It's the users pref, it's better sheathed, but I like unsheathed, with mega juice, you can roll, block, hit, roll block, if you press triangale, it takes time to pick your weapon back up? Roll, if you land on a spot where the monster could hit you, block, then hit. I think it's better than walking around hitting, and putting back your weapon.

blocking with GS too much is a bad idea since it cut too much sharpness... I usually use GS only for blocking roars and some things which can't be evaded anymore

That's when you have a sharp sword skill with 20 whetstones

Naa, my strat maybe pointless, but I like playing my quests epic. eg. Trying to Full level 3 charge Ukanlos, while he's swimming, discarding my last 4-5 potions when a monster has about 900 hp left, the strat I gave, trying to fight dual tiggys at once in Land of tremors, yeah. Epic. Stupid. Crazy. But fun. I did die when Ukanlos did that swimming move, but yeah I love a challenge.

1. Ceanataur armor: Pierce S/bow up, Presicion, and -20 defense, but i don't think a bow user will take much hit... but if you are, it can be counter by Defense jewel... It's pretty good armour for HR1+.

If you need power, i recommend Monoblos armour which will give you: Health +30, and Adrenaline +1 it has a total of 6 slots, you can fill 5 of them with Danger jewel ( Battlefield jewel, Monoblos spine, Wyvern skull shell) and Voila! you get Adrenaline +2 which will increase your Defense by 90+ and attack by 30% when your HP is below 40%.

2. Dunno

3. You should do a lot more practice using GS. It's really effective against everything due to the raw damage it has, and better yet, the 3 level charge, make it the most powerful weapon in MHFU. Yup, i agreed with gn_x00 you should watch the GS charge guide by Naijiao, it's really usefull