Recommendations for maximized pet damage in a Thug/Pain?

Pretty much as the title says. I'm relatively unexperienced with serious IO slotting, so I'm not familiar with all the little tricks. One wall I'm running into is that there doesn't appear to be much available to increase *pet* damage, since the global boosts supposedly only enhance your hero.

So far, I've put the Knockback damage proc (I don't remember the name right now, I'm sorry) into the Bruiser and Call Thugs power. I *think* I want the Enforcers to have the proc for Damage Resistance Debuff, though I suppose I could slot the proc for more damage in them as well.

Discounting purple sets, What else can I do for maximized pet damage? Or is this basically a waste of time? What do the rest of you guys generally slot for?

Thank you in advance.

Also, while I'm thinking about it: Has anyone ever beaten the recharge for Gang War or Serum down to tolerable levels, and if so how(discounting the multi-billion infamy investments, such as LotG)?

Again, thanks in advance.

My necro/pain is slotting for recharge to maximize the uptime of world of pain, anguishing cry and painbringer, as all your damage boost is in these 3 powers (+dam in WoP and PB and -resist in AC). Currently I am focusing on slotting Doctored wounds sets in the heals - Nullify pain, soothe and suppress pain are good places for these and doctored wounds is not all that expensive either.

Unfortunately I can't think of much other than that in the primary/secondary. Obviously if you take a movement power that accepts def sets you can slot an LoTG +recharge and if you can squeeze an attack from the primary in to your build you could slot a decimation set in it, life drain would probably be good for this. Depending on your patron pool there are some other choices for recharge - I am going to go with Soul mastery which will let me slot stupify in oppressive gloom (+6.25% rech) and soul tentacles will take a positrons blast set.

Not having attacks or defenses cuts down on a lot of the classic places for IO sets with +recharge but you should be able to get a much as 5 sets of DW to cap the +5% recharge bonus (Nullify pain, Soothe, Suppress pain, Share pain and Painbringer). Throw in a couple of 6.25% bonuses from decimation sets in attacks or other sets in patron powers and you can get 30-35% global recharge easily (and fairly cheaply). If you can squeeze hasten into your build that will help a lot as well.

I agree with the earlier poster who noted that LoTG +rech are probably cheaper to go with than purple sets, although finding places to slot either will be difficult as there are no purple sets for heal powers, the Soulbound allegiance won't give you any bonuses that help with your pets and that doesn't leave you a lot of purple sets you can slot. If you go with flight or leaping as a travel power you can slot an LoTG in hover or combat jumping and if you go with mace mastery as a patron pool you could slot one in scorpion shield.

EDIT: On slotting your pets definitely put an achilles heel -resistance proc in enforcers. That is one of the best procs you can get as long as it will go off reasonably frequently as it increases ALL damage by 20%. If you frankenslot pet damage IO's you can cap damage and easily get 60% accuracy in 4 slots (3 x L30+ acc/dam IO's and 1 x L30+ damage) leaving up to 2 slots for procs and extra's. Since you can slot the pet aura IO's in gang war this means you could slot the achilles heel and a damage proc in enforcers - the Lady Grey negative energy proc is a good one.