Aether and chaos are similar damage types as to how they work yet there are two RR sources from masteries for aether (Hellfire Mine and Spectral Wrath) and only one for choas (Hellfire Mine). When playing aether and chaos builds the aether ones feel stronger when playing them. I think one additional source of chaos RR should be added. Natural place for it would be the Curse of Frailty. It doesn’t even have to be high. 20 - 25 % at soft cap would be allright. Or it could go on the Bloody Pox if CoF already has too much.
I would also like to see some small Arcanist RR. Would it be even mechanically possible to give the Fabric of Reality something like 20 % reduced target’s resistances for 3 seconds which activates out of weapon damage. The same thing is on Eternal Band ring or similar on Viper and Ultos proc. It could be added there instead of the racial bonuses. Maybe more like 30 % because of how this RR type works.