[Wish]

you need s5 or n5 for total army teleportation (unless both cities have a lab) either through fairy trod (n), astral travel(s) or gateway(s with two labs, I think this one is 4S)

additionally you can make a few items worthwhile - the flying ship, or the gatestone.

however the simplest solution is to utilize only those summons that can travel fast enough to reach the front lines efficiently. I think most people don't waste their gems on drakes.