Hi I want to build an Infinity for my Sorc. I am reading so much about it. Seems that a ETH Mancather is the best base for it? Also if it has only 500 dmg?

Self use or merc? If you want for your sorc (self use) you don't care about dmg only low req. If for merc you need good base with good dmg, Eth CA, Eth CV..

Giant thresher

Its for Merc use. I read about that the Mancatcher is better and does more dmg than the CV or Giant Tresher. Is that right ?

Nope. Eth CV and Eth CA

But a Mancatcher has a lot more attack speed

Watch what frames you want.. And also which equip is your merc using (armor + helm) . Eth CA CV and Tresher always best dmg

Sugosu have rights , but with eth mancatcher merc survive better .

I recently watched my merc leech back to full life from a spec of health using ethereal Mancatcher. I am a believer