Hmm, pardon me for not reading through 100 pages of this thread, but IMO there's a nice PvP setup alternate to Gris Caddy which can and should be used.
4x Shaeled Gris Caddy -> Grief Phase 31+ IAS
Duress -> Fortitude
With these on, you'll be dealing insane damage in 7 frames, which is, well, quite slow, but still very appealing. Base the calculations on: average Grief damage ~400 with Phase blade damage included, you receive roughly 400 ed from Mastery, Feral Rage and Strength, and 300 ed from Fortitude. So this 400 damage get multiplied by x8 modifier, so your final physical damage with Grief/Forti combo should be about 3200 dmg. With lots of skill bonuses/damage charms/higher str this could possibly reach 4k damage still at 7 frames. And thats not max damage, thats average.(!) Pretty nifty. Considering the fact you will have the bonus Venom on Grief, OW on gores and also the fact that Feral Rage is actually faster than 7 frames if you hit often (unsure how it works, but pretty much assured that its connected with successful hitting, if you try to hit an Exile Pally or Ironbarb, you wont ever get faster than 7 frames), this is an ungodly dps.
Combine this with nearly highest ever possible life on char (a ladder Wolf Baba I duelled claimed he had a 10k life wolf on NL), great FRW, pretty nice AR for such high dps (easily over 20k with dual angelics, somewhat harder to do with other rings, but still possible), godly wolf FHR and pretty nice resists which many other Were-Builds seem to lack, and you'll eat most duellers for breakfast.
One might wonder if Fortitude has slightly low defense for a char with 600+ ed, but they forget the very nifty CTC Chilling Armor on Forti which more than makes up for lower armor defense. (as WolfHowl itself and Stormshield have very nice integer defense which is boosted by it) It definetely beats both Stone and eth bugged Prudence, leaving Duress for some special cases.
As for alternate ring options, for people like me who are not just ready to insert a Cham in a WolfHowl (there are better and cheaper socketing options for it, really), a Raven is a must. So, this leaves us with up to 250 AR from a Raven, and about 1k AR from Angelic ring/amu. If we are not poor, the angelic combo might be substituted for another Raven (+250 AR) and a MetalGrid (+450 AR), which give +700 AR total, not that far from angelic. And another Raven basically means we have another 20 stat points to spend - our wolf gets 20X4=80 BO'able life - more than enough to compensate for the life from angelic combo. The obvious benefits are +25-35 resist all and up to 350 defense that becomes about +2500 to total defense when affected by skills. Not bad.
The one obvious drawback of 7-frame wolf is the thrice-damned Smite. Vs Smiters, you will lose most of the time. This leads us to another path to follow after the high level breakpoint - spend points into Mace Mastery as we gain levels 85+ and switch to Gris Caddy/Duress versus Smiters. Increased Speed cannot be better than FRW charms, it gives +1 FRW after lvl 10, much like Natural Resistance, whose diminishing returns also come into play quite early. So developing a second mastery is indeed an option. Versus classes other than smiters however, you will rock. Some really twinked-out WW barbs might give you troubles as they still attack faster and have superior range (and are uninterruptible), but, if youre really devoted into making your wolf, you will have higher life to compensate. But you're definetely guaranteed to have a chance vs everyone.
If you ever go PvM, accept the one bad side of wolf barbs - really slow blocking. Consider Shael'ing your Stormshield in that case. This also might come handy versus Wind Druids and Guided Arrow Zons, as these will put you into blocking animation quite often, but experience tells me that these duels are more issues of good FRW/damage in case of Zon, (Put on Cats Eye instead of MetalGrid or Angelic Amu, you will barely need any AR versus zons - they dont have enhanced defense skills, only dodge/evade/aviod) and micro skills vs Wind Druid (KILL THEIR OAK, its nigh impossible to do without that), but still, that extra block frame could mean the difference between life and death, so, if money isn't your primary concern, keep a Shaeled Stomshield in stash to counter these.
To conclude this, I've calculated that a Gris Caddy socketed with 40/15's in tandem with Fortitude will do about 3/5 damage of Grief Phase at 5 frames, which is faster than Smite and still in high-damage area, meaning probably the best weapon for a Wolf Baba. I would like to see a person so ungodly rich to do that, though. ^^