I will make a fire sorc but i havent play d2r about 2 years so i think there some change for merc?

Whats will be the best merc for a fireball sorc ? Wich act and gear

Yes

Conviction right?

Responses likely to be trolls.

I'm unsure of the FB meta sorc merc. My guess is insight fort cure for gear but that is really a very uneducated guess.

Infinity act2 merc, as it always was