Unlikely tactics, niche tactics, and specialized tactics.

[Rytek]

The bait and swithch: Teleport, faerie trod,fly in using flying ship a middling weak army onto an enemy castle which is brimming with troops and mages.
Next round move that army out and teleport,cloud trapeze, fly or just regular move some high MR thugs and SC's. into that province. When he rightously sallies out to kill your army, you greet him with earthqukes, bone grindings and rain of stones. Next turn move your army back in and knock down the walls of the emty castle.