Okay, my idea is that you can roll the Army Summon and the Monster Summon all into one spell. So this is how it works: First you pick up the Summon Spell. Of course, you would have to pick up your soldiers. And then the fun begins. Okay, so you go to the Army Menu and there will be options to switch allegiences. You can switch from options like Soldier, Goblin, Ork, Undead, Nature, and other factions. So lets assume that you switch to Goblin. Then instead of Summoning Swordsmen, you would summon Goblin Swordsmen instead, Goblin Archers instead of Archers, and so on. The Goblins you summon are just morphed versions of your own soldiers, so they'll be at the same levels. And they should have that blue glow that was in MR2, just to show that they're in your army, since even though you switch to Goblin, Goblins will still attack you. Also, you won't get all of the factions at once, you'll have to collect them.

Here are a few examples:

--Goblin Allegience--

Swordsmen > Goblin Swordsmen
Archer > Goblin Archer
Monk > Goblin Mage
Dwarf > Dwelling (It UnSummons after using all its troops and can't be summoned for the rest of the screen)

Of course, this does seem to be a lot of work, but I think it will be worth it.