I've seen several things that people think is an "alternative" ranging from impractical {passing movement to all, click to move, mammoths} to totally against the rules.

If you really, really wanted to make it work, I suppose you could use a combination of mouse-passing for C2M and assist + IWT to move into range on an enemy, but you still have no way to gather up your slaves and get them all positioned to move anywhere. Once you're scattered, you're reduced to manually repositioning your slaves before you can attempt any sort of travel again because you have no means of follow to get them all facing in the same direction again.