Nah, he doesn't need his drop rate increased. Shenk, like Eldritch and Pindle, are already too close to the waypoints + super easy to kill. That's actually why their drop rates are nerfed; it's too quick to farm them.
Nah... not a good idea. There are plenty of mobs to farm and beside that, farming nitha doesn't take too much.
i tought little about the ones who are using *coh* *forti* and dont have teleport , maybe could be a little boost for them with low chanches
***Shenk The Overseer*** Shenk may have a nerfed drop rate, however he still has some of the best drops for HR's, if you are patient. I've had several HR's drop off Shenk/his minions. (Including Ber/Jah/Cham) Don't underestimate the RNG odds with these "underdog" mini-bosses. I bet half of you don't even kill Thresh Socket anymore and this is yet again, another mob with expedentional chances (even if random). The more you know, the smoother the hunt. Knowledge in the battlefield will always trump a list of varying "complied data entries"
I usually hunt down: Shenk, Eldrich, Tresh, Tooth, pindle for rare items on 600mf necro. Then finishing of with nihl/baal. Got some nice rares there, so I dont think you need every super unique monster in this game to have modified drops. Also his mlvl 83 is pretty low to have "quality drops".