Basically un-killable [Inaros Prime]. I subsumed Warcry to keep the melee damage high after swapping out Arcane Fury for Arcane Guardian. This is my main build - a boring old tank - however he's awesome as a platform to test the limits of the weapons you're building as he can withstand pretty well everything.
At the start of the mission, use his 4 (Scarab Armor), and top it up as needed. You will avoid all status effects including knock down with the help of [Negation Swarm]. Unstoppable force, easy to pilot, awesome frame.