For a while at least momentum will be purchaseable for about 30 blood crystals. (15 per magi cache that give 10 obolus each). There are also good maces in the UC and warmakers. There’s just such a huge gap in performance on thralls between maces and any other weapon set.
And funnily enough I took a geared thugra and he solo’d rockslide even though he was knocked down 90% of the time and swinging at air 80% of the time and I didn’t help at all. That’s how powerful maces + thralls are now.