Lower level summons?

[Sedna]

Mound Kings have been mentioned already as a useful ferry, but I am wondering if anyone has ever really exploited their unique characteristic: 4 strategic movement. Outisde of Vastnesses and horrors, I think these are the only summons which can move 4 provinces, and the cost is minimal: 3 death gems and 1 death required to summon.

This has to be insanely useful in some situation. Of course, they are hindered by not having feet, and thus are difficult to equip for flying (Stymphalian Wings and Magic carpets are possible), and there aren't any fast (4 movement troops) for them to lead across great distances. But you could easily summon a small squad, and send them places where you foe knows nobody can reach in one turn. The only question is what the best gear for them is...