Tir na n'Og

[Squirrelloid]

Assassination is actually a great tool, but remote spells tend to do it so much better that actually having to move an assassin somewhere, even by cloud trapeze, is pretty inefficient. Basically, cast a spell which assassinates now? Or move/cast a spell to move, assassinate next turn if your opponent hasn't moved, and then have to move again to keep up with opponents army.

Assassins seem best during sieges, either to take the pressure off your defenses or kill defending commanders while you wait for the walls to come down.