As i know, Mah has extreemly mobile crew. Well, not like zipp, but Mah can push herself and 3 other models if she needs.
If you want Old Major, you should use his ability to give "+" to atack and damage flips to other pigs. It could be great, cause Mah's crew has a huge attack potential. Trixy may cheat fate to give +1mi, Emissary may add +1 more, and you get ~8mi and positive flips for pigs who start their activation near Major (just place your crew correctly with Mah's help and let them attack!).