By 'Mars orbit' do you mean orbiting Mars, or the same orbit as Mars? Also are those dimensions 'scaled to Normal' or actual size. My guess is actual size, otherwise the Moons would be bigger than Mars! It probably depends on how many of them are Moon sized. If in orbit around Mars, Moon-sized satellites could help a little by providing gravity assists, if there are not too many of them. If they ate in Mars orbit they could get in the way of a Mars transfer orbit if the are any the are close to Mars - so make Mars landings harder.