Oh good grief.. Regen is not the worst and excels at most content. It benefits greatly from fast attacks (so you can click a heal when needed) and high recharge (get those heals back faster).
Paired with anything providing -tohit or +def = bonus.
This thread has such creativity.. so many great characters and costumes from everyone. I was late to this thread (page 22) and am always delighted by new pages of ideas.
Beyond just costumes, it's great seeing epic moments & funny quotes people find in game.
speaking of page 22
Elec/SD/Elec is likely your style stalker.
Maybe dark/ or even spines/ or another tier 9 aoe
I like the single target focused sets and find it more interesting.
Attached is a possible starting point, maybe squeeze in ball lightning.
Stalker (Elec-SD) Sneaky Boom.mxd
Minor suggestions that could open up options elsewhere.
Add somewhere
Reactive Defenses: Scaling Dam Res (3% - 13%)
Put in Fault
Force Feedback: Chance for +Rech
Add
Numina's Convalescence: 10% Recovery and 20% Regen