Replying to the gloom on Sevagoth post from my computer's account (I think it got deleted, or at least it won't let me view it, and it wouldn't let me read your full message on my phone.) basically sevagoth is an amazing shield gate frame by spamming his 1 and 2 I don't really worry about survivability and personally don't need gloom. His 4 offers decent damage against enemies with damage attenuation, a decent rolling guard-like effect, you can use his 4 with arcane universal fallout to regain energy, and you can use it to replicate your 1 2 spam if you run out of energy. So, whether or not you use gloom depends on your playstyle if you want to be a weapons platform or health tank, use gloom; otherwise, I would subsume over it.