Okay, there will be a few mission where you wll encounter some giant-sized AC, with an enormous gun. These are pretty hard to defeat, but some tips can make him much easier.

1- When he shoots at you with his semi-auto rocket launcher, stafle in any clear direction. If you have any speed at all, you should barely outrun it, without getting hurt. Shoot him while you're stafling to inflict major damage.

2- Despite his size and strength, these super ACs are very fast, so Beam Sabers aren't very effective unless they come to you.

3- Don't let his size intimidate you. He may be big, but he's easy.