Inferno’s main forces.

You’re talking about hundreds of Centaurs when their growth rate is only 14? Plus, the losses in battles against neutral creatures? And learning Berserk on week 3 is quite realistic. At worst, you can weaken them with Plague. What about Cave Lords? We shouldn’t forget about them either. At best, your Tilseck will have a bunch of Goblins, a dozen Shamans, and, say, 50 Centaurs, but no Battle Fury. And the Ballista will kill 3 Imps per turn. Meanwhile, Daleb will have Hellfire, Plague, and a powerful Ballista.