Orcs vs. Humans

KillAndAction And what abilities are we talking about if the Orc is affected by mass slow? (all initiative goes down the drain), and then mass confusion, all resistance goes down the drain (we smile and wave at the warmongers)...

If you cast various slows and confusions at the beginning, the Cyclops will definitely reach the Knights. And if that happens, the army is doomed. You don't need to worry about the Warmongers; most likely, with this tactic, there won't be any in the Orc's army. You simply need to use your wits so that the hero casts Dominate on them before the Cyclops' first turn. Then you can indulge in confusion and slow, although I doubt they will be needed.