[VedalkenBear]

Without a spell (Cloud Trapeze I believe also works), immobile commanders are just that; immobile. Treelords could probably use Faery Trod.

I haven't used Treelords much, but they have more or less full slots, correct? Consider a Sibyl in LA Arco. If they have 3N, you can forge a Thistle Mace to get to 4N, and a Moonvine Bracelet to get to 5N. You can then summon a Treelord, give _them_ those items, and have a very high Nature magic to throw some of the global spells, or other items.

This can be used with other types of magic as well.

Small note: AFAIK, Sphinxes can't move at all. Not even with Magic.