Will domination mode be fairly balanced for all the mages after all? Or will there still be a strong bias in favor of mages with lots of creatures? I'm suspecting that aggro builds will tend to use more zone attacks and ways of dealing with multiple enemies at once, and will really try to stop the enemy creature sources, either by blocking LoS to them or destroying them. The problem would be that they would still need enough creatures to control the zones with the power orbs, so aggro builds would be in trouble since they generally don't pack that many creatures.
Assuming it's not already being implemented, my suggestion for making few-creature mages able to play domination mode on equal footing with many-creature mages is this rule:
Once it is captured, a power orb can never be under neutral control again. When a power orb's zone is under neutral control, that power orb remains under the control of the player who last controlled its zone.
I'm not sure how well this would interact with sslaks and the channel increase of power orbs though. I'm thinking those two things might be completely unnecessary though. If you want to increase channeling you can cast a mana crystal. If removing sslaks makes aggro op then just adjust the stats of the sslaks so that they're just weak enough that aggro can destroy them in the early game, but just strong enough that it can buy control some needed time for the late game when it will be ready to destroy them itself.
Thoughts?