WE. LOVE. RUPTURE. :D.

Not gonna sugarcoat it,
Ego Gift Obtained: Thrill
At the start of the turn inflict 3 rupture and rupture count to all enemies. At the end of the turn if an enemy has at least 3 rupture count they take rupture count x rupture potency damage, then remove 2 rupture count.
Ego Gift Obtained: Enrapturing Trance
(Fuse standard duty battery and talisman bundle)
(I forgot the description so I’m just gonna wing it)
Only activates when 5 or more units on your team inflict rupture
On hit: inflict 5 rupture potency
If there is 0 rupture count, use up 10 potency every hit instead of removing rupture from the opponent
Ego Gift Obtained: Thunderbranch
When inflicting rupture potency with skill effects, inflict +1 rupture potency and count (making all rupture attacks at least count neutral and adding potency)
Combine these three to melt bosses (even gasharpoon ahab)