Hello guys !
To be clear, this is NOT a beginner friendly build, and I do NOT recommand it if u are not sure of what u want to do.
U can forma the Exilus and use a normal [Stretch] if u want a cheaper build (still needs one Umbral forma). [Archon Stretch] is here for a bit of energy gain. I do recommand energy max shards, and two casting speed shards, as u want ur 2 to obliterate fast your enemies. Steel charge for the melee part of the frame, and the extra place. The arcanes are just my go-to, but u can do what you want here.