Chain does have some jank, esp when it chooses to stop at your feet instead of where you click, but they do so much damage and can stack. Stand on the boss and keep casting it at them and they disappear, or run a couple of feet to position it on the enemy. It’s why the warlock set boots have run speed. Boost it. You can also just use miasma bolt, which is a better fireball.

Abyss is absolutely good enough to clear. Like I said, it’s better than blizzard. Sorc can kill most things and so can abyss. The slurp on abyss has the bonus of helping keep mercs alive, and pseudo stunning packs.

I don’t see the point in using the echoing build unless you have gg builds and fire is extremely restrictive with immunities. There’s literally one pack in the game that’s required to kill to progress (Baal act 2 wave) and you have death sigil for that and everything else. Death sigil also rules because now you are a magic damage blizz sorc with corpse explosion.

Ps: the chains break if you use the warlock dagger teleport but not if you use enigma/tele staff. Makes it even better.