well I was reading markx's post on the introduction thread and noticed he said:

quote markx2475

this game could be a little easier on the new character training, wenever i go train them i usualy put Laharl there in case they die, but somehow Lahar is most of the times the one who levels up or kills most of the enemies.... =(

Basically, I usually buy them the best weapons and armor that I can afford....I usually save up a lot of HL for that >_>

After that, I bring them to the current best field for leveling up that I have (that I think they can kill a weakened enemy in anyhow)....I weaken enemies with my stronger characters (mages are useful to do this, since they can attack wide areas at once, with higher levels in spells)...

After I get one or two weakened enemies, I either kill them individually, OR if I think my character can handle it, I combine them so they get extra EXP in the turn, and that leads to HL bonuses at the end of the map too, which is very nice (since I usually visit these maps a LOT)...

Once my character's HIT is decently high, and can dish out, and receive attacks well, I let em take on more combined enemies....usually, with a LOT of enemies combined, I allow a combo boost to form, whilst carefully avoiding (as best as possible) killing the target...If I fail, at least I get the HL bonus at the end of the map, and another character gets the bonus EXP....

Personally, I don't much care for the item world >_> But I know a lot of people really like it...

i go to the field with the strongest monsters, equip the character i want to level up then i get a strong monster down to maybe only having around 200 or less then i use a combo with the character i want to level up and my strongest character, i've level characters at level 1 to level 30 in one attack

you can also go through the level and kill all enemies but one.

if there is a EXP bonus at the end then just before stiriking the final blow pull out all the low characters that you want out onto the feild up to ten.

when the level ends they will all get the EXP bonus. this sometimes takes awhile but if you kee[ this up from the start of game then the characters will level up slwly as you go. the only problem with this is the fact that the weapon mastery level doesnt go up.

i wait until i get to a map with EXP boosters and play them through over and over