"MoD+Retreat" defeated w/o killing caster

[K]

llamabeast said:
Any smart guy who plans to (ab)use MoD will only use it for the first time against a big enemy army. Few big armies are equipped to cope with it, so it's probably an insta-kill on that army at least.

I view that as a newbies' conception of a "big army", rather than an experienced player's conception of a "powerful army." I think that I've shown that an army prepared to deal with SCs and thugs should beat MoD + BE, so I'm not sure if it's an important issue.

I mean, a powerful army is composed of diverse elements using several different "winning" strategies. The late game is about mastery of magic, and not about mere strength of arms.

Considering that I believe that this is the one of the PC games I think has "1-2 years" time to achieve mastery (or at least competence), I reserve my judgment to whether adding this complexity to the game is "fair".