There are two special stuns: One targets Willpower (Stun Gun), the other Physique (Headbutt).
They also have Stun Batons. If I'm not mistaken, the Stun Chance applies to their basic attack.
I think part of the problem is at some point after they were added, Stun Chance was changed from a pure...
That doesn't tell the player it has finite repeats, which is the problem. 'X cycles remaining'?
Also, there are a number of pointless recurring logs that train the player to not pay attention. (Cumflation decreases, Honeypot notices, etc.)
I've done some testing, but not a full playthrough yet, so this is mostly theory crafting:
Kineticists get +1 damage/level with Psionically Attuned weapons (currently only Staffs, which are also Crushing). Telekinetic Warrior is also Crushing.
I think Evasion might actually be your best...
They're not quite identical. The cheaper one is Classy.
Kirila's Maid Outfit should probably be re-named Maid Uniform (as the internal name), to reduce confusion.
Also, bump for 0.9.073-PUBLIC#3944.
Did a quick test. Level 12 Kineticist with 65 Will & 3 Physique reliably Tripped Urbolg with Gravity Flux.
But if you want to use the Hookstaff to Trip, you'll want Physique.