Cool concept!
I, also, as well, have a StJ/WP scrapper doober, and while the concepts aren't identical (my lil guy is more 'technique and chi leads to power and speed' over say car-chucking and bullet dodging), they're a lil similar.
I am not an expert, or even very good (i have no idea what the optimal place for superior critical strikes is!), but I will supply a couple of opinions!
Off the cuff, I feel like your Fast Healing is overslotted for what it does for you, while RttC could get you a lot of traction by slotting in To Hit Debuff; it's the secret sauce that spikes WP's defenses a lot, probably more net HP's worth "retained" over the regen you get for full heal slotting.
I feel like combat readiness is also over-slotted. I always thought of that as a 1-slot wonder if you can reliably get your accuracy from somewhere else, like normal slotting, a toggle, or set bonuses. That said, your ToHit is bananas! Where's that all coming from.
Is proc bombing all the rage these days? I ask because I see 3 instances of Kinetic Combat that are all 1 piece away from 7.5% move speed glory.
Likewise, Aegis offers better Smash/Lethal resistance at 4 slots, plus gives 7.5% move speed at 2 slots.
Here's my totals (RttC at 4 targets):
My concept has a lot "concept choices" but here's my slotting if it's useful to look at. Key differences in totals are: ~8% more smash lethal resistance, same-ish psionic resistance, way more fire/cold. Some defenses are lower, but RttC is throwing out -6.29% To Hit.
I'm using musculature radial paragon right now (to hit debuff and run speed are so tasty), but Spiritual Radial makes an extremely strong argument for itself.
...Hm, note to self, I should really just stick a guassian proc in combat readiness instead of recharge, for as much as I remember to use it.
... ...Oh, wow, I don't even have impervium psi res slotted. I should fix that lmao. maybe I need to post myself in another thread.