I'd like to add that there is another alternative build that I've tried using earthshifter, and it most certainly is capable of a quick kill speed, even in large, hell games. But the build is a bit of a glass cannon if you don't have good supporting equipment for the earthshifter.
Basically, it was a geddon-wolf build. Skills were as follows:
Shapeshift
20 fury
5-10 werewolf
10-15 lycanthropy
2 pre-req's
Elemental
20 geddon
20 volcano
7 pre-req's
rest in firestorm
Pro's: Hits hard - 7k+ max damage, decent geddon - i believe max was somewhere between 4 and 5 k for me.
Con's: No oak sage, non-maxed lycanthropy, and many points required for strength = not as many hp as is normal for a wolf - I was only a few hundred over 2k hitpoints. Even shaeled, the earthshifter hits at a 7 frame fury (werebear hits much slower, so i wouldn't consider that). It does good damage and kills monsters fast, but 7 frames doesn't provide the nice smooth life leech that a 4 or 5 frame weapon does, nor does it allow you to respond to situations as quickly.
Good setup that worked well for me: Jalal's (um'ed), chains of honor, shaeled earthshifter, gores, ik gloves/belt or dungo's/dracul's, mara's, ravenfrost/dual leech, and a nice assortment of charms. Also, you need some way to get your AR up, as werewolf isn't maxed and you have very little dex. I used demonlimb, or later (around lvl 90) i was high enough lvl to get decent hits in. It also really helps having a merc with reaper's toll.
Bottom line = I killed pretty darn fast, even in large hell games, but i also did my fair share of dying. Not an easy hc build. Definitely a lot of fun though, and I just think earthshifter is a neat weapon and I just HAD to try out a build that fit that weapon.