Try getting another aughild's piece for your shoulder. I think losing 500 dex set bonus by breaking up the 2 piece marauder bonus is worth getting the 2 and 3 piece aughild's set bonuses. I don't use perfectionist and I use the wolf pet, and I won't die unless I get a very difficult elite pack or don't pay attention to those charging attacks by big bull mobs.
I have 460k hp and 525 AR from items, and survivability is not really a problem with a smart use of vault and smoke screen with the healing vapor rune. I would give up about 50k hp for more AR up to about 700 if I could. If you have any other belt, I would go with one with dex, vit, AR, % life over hellcat. Oh the templar is very helpful for being a meat shield and he also heals, stuns, and provides life regen. Gear him up with life, life %, and AR.
For me personally, I was surprised at how effective the 2h crossbow + quiver combination was after dual-wielding with 500% chd. My sheet dps went down a lot, but i can clear t4 rifts with 2h crossbow + quiver just as fast as I can clear t3 rifts dual-wielding. Maybe it's the buriza's pierce + entangling shot + cull the weak combination. I also noticed that I'm spending less time using hatred generators because I can't spam CA as often. Also offensively, I think you should aim for at least 40 to 45% crit chance without any crit buff.
So in short, aim for 1 more aughild's piece (shoulder with dex, vit, AR, recourse reduction), try the type of belt I suggested, 350 to 400k hp, 500 to 600 AR, 40-45% crit chance (your soj is a good start). Also try different weapons/quivers and passives.