This boss scared me to death way back when cuz hes so big. shoot whatcha got!
2nd form is a lot weaker as well and I got lucky starting next to him. Didn't really have to move much.
heres some tips I easily noticed that really help after re-watching this video. pick up life as soon as you can when you have lost more than you will gain from it. LIFE will re-generate quicker as it did near the remote mine building. the same goes for weapons as you can see the Power missiles returned which ended up helping a lot. if you life is in low yellows or red, always get the full health first(unless a quick fix is close by to save you from death). you'll use much more of it then.