Saw you had a necro post so I wanted to give it a shot. Not bad! My only gripe seems to be that it seems to suck up frame rate for no reason, is there something I can play with that possibly would help with this?
I was running 12 instances with it yesterday with no lag, so I cant say for certain what would be causing it for you. The only class that should lag any more than the others is mage because it does a ton of inventory checks for modrods, clicky nukes, etc. The easiest way to reduce system stress within the plugin is to change your CycleDelay=3 to something a little higher, like CycleDelay=10. What that means is that once every 10 pulses, it actually checks the plugin. My base pulse is like ~30 times a second, so even once every 10 is usually a couple times per second.
[MQ2Bot]
CycleDelay=3
And since I was replying anyway, posted latest version:
20140715
-Fix pet heal crash
-Ether-Fused Shard should stop trying to cast if out of charges
-Disabled detection of all the punch in the throat line for zerkers, uses cry line instead
-Savage Spirit and Untamed Rage should now only attempt if not using a disc already.
20140718
-Added corpse check immediately before /targeting mobs to kill so that it would have to be checked almost exactly as you /target in order to accidentally target a mob corpse
-Changed: only activated AA should get added in the AAIfX section.
20140719
-Added Bot.Zoning to let you know if you are zoning
-Added Bot.Instance to let you know if you are in a zone