Re: Optimal gear for Act 2 offensive merc? (fishy)
Eth Infinity CA/CV (CA is more expensive)
Eth Fort - resists, %ed, high defense
Guillame's Face w/ an um or +str jewels/runes for the infinity
Infinity boosts you as NumtyDoo described.
Guillame's Face gives your merc another 35% CB.
With 75% crushing blow, your merc is ripping stuff apart like no one's business.
Life tap can be used to overcome the lack of leech, and honestly it's very rarely needed. (Typically only on ubers or nasty elite monsters)
Never, ever, ever, ever, ever use an item that freezes your enemies as a summoner. CE and summons/revives are your life. A shattered corpse does nothing for you.