Well. So far, I haven't had time to play as I'd like (Some family tragedy happened) but what I've seen of the game so far is good graphics paired with not so good control schemes... I think the fact of attacking with the same button as grappling ain't a great idea... I'm at the second stage now fighting with a gigantic helicopter. When I defeat it I'll tell you how I did... I think you gotta grab incoming missiles to toss them at it (Not sure, And I don't know if it is the same robot we are talking about)
Well I had a little trouble with it but ow it's really easy.
Just remember to send all your energy output to Live support so you'll be more resistant.
Second, do not forget you can fire from time to time homing missiles with triangle button. (Really, I didn't notice it before, and they are really helpful) you just gotta be "locked2 to the enemy, and Voi-la
Third, never use the UniBeam unless the helicopter has low energy and it is not fighting along the mini ships.
Now, your best advantage is distance, and altitude.
If you hoover over it at a good distance, you can fire at it, you'll always have it on the HUD, it'll be easier to aim and you'll be able to grab rockets back to him.
If it deploys the mini ships, just go for them ASAP, if you fly straight to them you'll grab them with circle button and its better to destroy them like this, since they won't hurt you while on the cinematic cut.
If you are being hurt too badly, just run away... Or... FLY away, recover and go back to action.
Remember that if you prevent the mini ships to wreak havoc, you'll be awarded with hero points, so keep an eye on them.