im thinking I can use this same exact build but instead of Raekor 4 IK 6 swap them to Raekor 6 IK 4, and that should be good enough to do GR 55. (I'll let you know how effective this method is) So the only gearing I have to do is swap out boots/pants from IK to Raekor. Pretty straightforward. Strategy wise, you lose the 250% damage buff from keeping WOTB up permanently. But you gain a ton of spender damage. I will play around with this. It may be worth while to swap out Boulder toss for a different spender to maximize the damage from Raekor 6 peice. But again, that's probably not necessary at GR 55.
Update: it was a joke how easy this clear was. If you have a raekor's ik6 set that can clear in the GR 60's comfortably, then all you need to do is switch 2 pieces out. The damage is a lot less, but should still be enough. Also bolder toss does an insane amount of damage now, so make sure you use it on elites.
Now the one I'm not sure about is Wastes. I was looking for a good 6 peice solo Wastes build and all I really saw is globe farmers and speed T10 farm builds.
So I looked up the season 3 WW Barb build that was capable of GR55 back then. 5 peice wastes, 3 peice IK with a RORG. That build didn't work...
I then tried this t10 speed farm build with two major edits.
I swapped out WOTB for rend and I replaced the Armor slot in the cube with the mantle of channeling. I didn't have the CDR on gear to maintain the WOTB bonus, but my scrapped together gear, with some really crappy bul-kathos swords, was just barely enogh to get me through a GR55.
again these aren't suppose to be the most powerful 4 builds... Just the easiest for someone to gear for and quickly get 4/6 of Years of war completed.
I feel like you may run into toughness issues. Your setup basically swaps out the bonus of band of might, for the bonus of hexing pants. 25% damage versus 60% damage reduction. (You would have to cube the mantle and wear the waste shoulders to make the swap)
I would also recommend getting focus and restraint on there for the 2.25 damage multiplier. You'd have to swap out something to be a reliable generator for the buffs. Maybe ground stomp for furious charge.
In theory I like this approach. Chances are you already have most of this gear if you main leap quake, so it shouldn't be too hard to transition.
theres also no way to keep WOTB up permanently in this build, so I feel that ability slot could be better used on a different skill. Battle rage bloodshed gives more consistent overall damage boost, rather than the larger, bustier buff from WOTB.