With the uncommon boost it will give your pets about an extra 15% damage enhancement (assuming you are ED capped) this equates to about 5% more damage. So overall not a huge boost. That being said my recommendation for MMs is to go for either Musculature or Nerve once the rares/very rares come out. The incarnate TFs are +4 to you so pet accuracy as such is a real issue. If you have Tactics or some good defense debuffs and your pets are ED capped for Accuracy you're ok but otherwise Nerve is probably the best option, since otherwise your pets will miss quite a bit. As for Musculature, the damage bonus is small now but once the higher tiers come out it will be better and pet damage is the hardest thing for an MM to boost. You can use IOs to slot for recharge and you have plenty of options for managing endurance but pet damage is not something you can easily boost.
i am in agreeance with adeon here. you won't see much of a buff until you have a rare or ultra rare slotted, which is impossible at the moment. I went with cardiac(endurance) for my demons/traps, that made quite a big difference for me. I also suppose your boost choice might also affect what secondary effects the uncommon grants.
Muscular is the Best option for you. Not for the +dmg but for the Def debuff and Tohit Debuff.Also the Endredux will help you keep using the debuff.
IMO, Pets will die too fast to deal any dmg vs Lv 54 Boss/EB/AV and like Adeon say they will miss a lot, is better to focus on the benefit you can get for your /Poison.
I want /Fire stalker. Because nothing says stealth like dumping a can of gasoline on yourself and lighting a match. -Morac
I'm really considering going with musculature for my zombie/poison MM. Is there a real noticable difference in damage? If not i'll probably go with whatever accuracy is called.