I've been thinking about how to pull off a necromantic sneak attacker, specializing in chill and vampiric touch.
I suppose the big question I've had since this feat was added: given we can theoretically have an arcane trickster who's caster level is on par with a single classed sorcerer, are there any 9th level bad touch builds that will benefit from sneak attack? Does the early access allow us to do anything new?
Conventional wisdom says let your familiar do that for you (if you're a witch or wizard) but some builds may be able to have some fun.
An Unchained Rogue 1/ White-haired Witch 4/ Arcane Trickster X can probably have fun delivering her touch spells at reach (along with a free grapple check). The same can be said for a PC who takes four levels of aberrant sorcerer or five levels of blade adept arcanist (so that they can start burning feats on extra exploits).
I think a teleporting conjuration AT that delivers a touch attack and GTFOs with either the conjuration school ability or the arcanist exploit (or both) would be a pretty fun concept to bring on line.