Sockpuppet is super effective in U14. I maxed Shadowdancer 1st and enjoy much of the stuff in that line. With the new feats and EDs, sneak attacks routinely hit for 120+. That boosts average damage per hit in the 250 range. Currently on the fighter ED.
I'm still experimenting. I will post the final build details when I've got them figured out (what to twist, etc.). If we see DEX-based damage, I will definitely swap to DEX-based. On a halfling, I'll be able to get DEX crazy-high. I'm going to wait to see if and how that is implemented before taking the plunge though.
Edit - one other note. The DOT effects cast by the enemies in the new content make scroll healing a little more tricky. I've been finding myself using silver flame pots a lot more because of this. So silver flame favor is all the more important.