Architect - I find grenade launchers, plasma snipers.. esp the ones with like 42 rounds.. that's twice what my grenade AR has.. Although I've thought about adding in the grenade upgrade+stickys to the Kett Mini Gun.. one day I'll see if that can even get made.
That Kett Mini Gun is amazing as well.. just sprint left/right when it fires at you.. or jump/leap left/right etc.
The main problem I have on HC (haven't tried Insanity yet) is when it takes off.. it kinda heals alot.. and when it lands you usually have an additional leg to shoot out and a third more health in its head.
I like the fight on Eos.. was a surprise that. The Voeld One I hate, it's annoying freezing all the time. And the one in the dunes is fun too. Elderaan or whatever.
Gonna see if I can get a Rank X Mini gun, add the seeking plasma to it. Then try insanity run from start. On New+. Fighting them at lv 12.. isn't fun, esp freezing to death on top.