Strength Stacking Juggernaut: Plenty of questions

Current POB: https://pobb.in/fWrmtNrzx9vb

Hey folks, hope everything is swell with your league thus far.

I have been wanting to create a strength stacking build for a while now. I saw that Boneshatter Juggernaut were somewhat favorable so I pulled one together and farmed up towards maps. However, I haven't played a melee build (that's not Cast on Crit) in a while so things feels incredibly stubby.

I feel stubby. Everything I do feels very "locked" into place. Perhaps I don't have enough movement/attack speed, I'm exactly sure. Maybe it has to do with the skill itself.

My current list of concerns are as follows:

• I wanted to use Pillar of the Caged God because I once saw a video of some totem build with absurd attack speed utilize them so they resembled those wacky inflatable men that you'd see outside of most car dealerships (at least, that's the case in N.America) going absolute ape shit. My attacks don't exactly resemble this. I am open to changing my weapon of choice if there are more accessible options out there, like Brutus' Lead Sprinkler.
• If I'm sticking with Boneshatter, I don't know what my main supports should be. Should I lean more into the trauma stacking or keep them as it?
• What should my pantheons be? Or should I just capture every boss and swap them around as necessary?
• Gear is a bit on the more budget side. How necessary is that new Sentinel mod on boots that grant damage per strength?
• Where can I free up some gem sockets? I want to consider fitting in Enlighten somewhere or swapping out something for Defiance Banner or Determination for more armor.

Any advice would be greatly appreciated.