#1

I posted this as a response in another thread but wanted to spread the word as it is VERY helpful:

Ok, something that makes the fight WAY easier on all levels of difficulty:

Upon entering the boss arena from the vendor room, if you go down and to the left off to the side, there will be an octaganal (8 sided) island with a jump pad on it, with 4 or 5 ammo restocks in the vicinity around it.

The jump pad on the 8 sided island takes you straight up into a tube.

While you are in this tube, you are completely protected from all attacks in all his phases ( his crazy purple / pink laser MAY hit you through the bit of gap in the bottom ). Just keep bouncing up and down in this tube.

When you emerge out the top, unload on him. While you are travelling up and down through the tube, reload.

If you dont want to take damage or need to let your shields reload, simply buttslam back down onto the jump oad before you emerge from the top of yhe tube and you will not be exposed to any fire.

You WILL get knocked out of the tube sometimes, but it’s very easy to get back into it.

I was able to beat him with Wilhelm at level 33 (boss was 36) using this method, and with other chsracters it’s probably even essier.

EDIT: Thanks to @Greasy_Broccoli for turning me on to this life-saving technique!