Hey everyone, I am currently building a PvM Singer Barb and not sure yet about the merc. I have had three ideas so far:

#1: A2 with Insight. The build is extremly mana intensive, so i need that regen
#2: A2 with Reapers Toll. May help to break physical immunes and lets myself deal more dmg to other monsters as well. Will wield Insight myself on swap then.
#3: A5 with Lawbringer. May help to break physical immunes and lets myself deal more dmg to other monsters as well. Will wield Insight myself on swap then.

I have #1 in mind as a fall-back option if the others dont work, question for now is: What is better, #2 or #3? Reapers has a lower level for CtC Decrep (so shorter duration), but more inherent ll and especially more physical dmg (better survivability for merc). Helm and Armor will be Gulli 'Cham' and Fortitude in any case. Help appreciated, be it in the form of knowledge or at least opinions!

What's player setting and intended routes for the chat?

One option not listed is go with eth insight, but hold a beast in one hand then caster weapon in the other. Barb still easy to get to 105fcr. Fanat will help attack speed of Merc big time. Then he can rock forti, even tho some shattered corpses, not many

Eth reapers w/ ias jewel
Treachery
Guillames w/ ias jewel

I’d say reapers toll. That decrep is rly op.