I see. I'd make it so the units which are "lifeless" aren't affected by uw items, since whatever their reason for being unable to enter water is, having a supply of air to breathe won't remedy that. Behemoths, counting their mages, probably aren't technically "lifeless" and would still need their air (but certainly not for size 6), but mummies would be out.
But if it works that simple, well, the better for me
