[Mightypeon]

Hmm interesting idea, I did not really try that yet as I usually wanted my heavy infantry to close in ASAP with minimal buffs.
However, the range differential between most mages (30ish) and Arbalests is 15, it may be difficult to squeeze in the infantry into that.
Also, Ulms Mages are not neccesarily longer range, although the first 2-3 turns can be spend on buffing.

But thanks, I did not truely consider long range shootouts with Ulm yet.