Thank you for the great feedback, Warshades. I've spent some time on Test trying out these changes and others. Many of your suggestions were flat-out upgrades that improved my build noticeably so I really appreciate you taking the time to look closely at it and share your expertise.
I did have two questions:
Can you help me understand how EndMod is better for end recovery than Performance Shifter +End proc? I have viewed PS +End as 1.5 PPM * 10% endurance boost, which would result in 15% endurance per minute. Meanwhile a 50+5 PS end mod would give a 53% boost to Stamina's base 25% endurance per minute, which would be only 13.25% endurance per minute.
I tried taking Dominate and I did like it, but I found it rather expensive since I had to drop Focused Accuracy, then free up some slots for Dominate, and reslot some other powers for global accuracy buffs, which meant giving up procs. I managed to do that and wasn't sure if my overall DPS was higher, and I still lacked the tohit debuff resistance from Focused Accuracy. I'm just wondering how you use Dominate that makes it more valuable than Focused Accuracy in a Battle Axe attack chain. Maybe the Decimation +buildup was doing more for me than I understood.
Thanks again for the solid feedback. Testing this combo in general, I struggled more than I expected with the Psi hole versus Carnival of Shadows, but it otherwise felt very synergistic and sturdy. I've also tried a Shield/Fiery tanker that had very stable passive defensive characteristics and some solid DPS with Soul Mastery, even while fitting in Fold Space. Not sure which I like better at this point.