Psyker
12-24% Rending on Enemy Weak Spot Hit for 3.5s. Stacks 5 times.
5-8% Strength for 4.5s on Kill. Stacks 5 times.
Your Secondary Attack cannot be interrupted and loses 20-50% of Secondary Attack Movement Speed penalties.
-8.5--5.5% Charge Time on Chained Secondary Attack. Stacks 3 times.
Trauma staff
Focused channeling can be replaced for rending shockwave depending on whether your teammates can take use of it or not. (ex do your teammates have guns that would benefit largely from ignoreing armor)
Curios
Revive speed on curios can be switched for toughness instead. Alternatively ult cooldown reduction isn't terrible either.