Strategies to even out fight when my charmed pet is OP?

[theBinaryTwo]

So as a solo enchanter when I'm sending to mobs to attack each other, the best I can hope for is them to be equal levels so they beat each other up equally and when I break charm they are both one nuke away from death.

If the non-charmed mob it more powerful, I have a number of tools to weaken him or buff my pet to even the fight out.

If my pet is OP, the best I have is /pet sit, and often times that is not enough to make a meaningful difference during the fight.

What kinds of mana efficient strategies do you guys use to lower health of your charmed mob?