Is this a thing? I’ve never had an infinity before. Currently my merc has Gaze, Treachery and Insight. He never dies. Infinity would just open up other areas for me to farm, but would I run into mana issues without meditation?

Its useless
Go for light sorc if you have infi so you can kill everything

How geared do you have to be, to make that worthwhile? How fast is it?

I would either do insight or reaper's toll for blizz and infinity for fire/light sorcs

You won't run into mana issues with good gear and a point in warmth. Infinity doesn't really break many cold immunes and you should already have some points in cold mastery to lower resists.


Eth reaper's toll is actually amazing for blizz sorc if you enjoy that gameplay, your Merc will break most physical immunes, slow fast moving mobs, and kill much faster

This. Reaper's Toll is the best weapon for Blizzard sorc. And firewall helps a bit too.