im going to ask something that may be insulting, but when you say "maul" do you mean thundermaul?
You can check this guide
https://maxroll.gg/d2/guides/echoing-strike-warlock-guideThey recommend Hex Purge, I use only Hex Bane. Yes you need levitation mastery to decrease requirements on your weapon, just one point.
COH is relatively expensive, so leave it at the very end, it will increase your might aura from 200->220% or how much was it
You need 20 points in Demonic mastery, that will allow you to summon 3 demons (Bind 1 Hehpasto, 1 Defiler, 1 Goatman - but you will consume him, it will give you buff and it still counts as 1 demon used)
I have a hepahsto, defiler and goatman but if I consume defiler my damage not increase (85k) but when I consume goatman(89k)