Base units:
Mind Ripper: 1000
Water Elemental: 40
Ice Elemental: 30
Unicorns: 2000
Go for white, get another 1500-2000 rippers (and LOTS of population stuff; try it only if you can get your population above ), 30 Waters, 20 Ices, and some kind of geld fodder (archers, but your pop will REALLY need watching if you do!). You may substitute Sirenes if you really can't afford that many Rippers, but you'll need a lot (10k at least) and you have to make them fly unless you're lucky and the white mage uses ground fodder.
Go for green, get another 1500 rippers, 20 Waters/Ices, and any fodder that can push your elementals down to 4th or lower stacking.
Go for black, cast Gate like there is no tomorrow. Use Sword of Light and Flasks of Holy Water. Try to stick Mind Rippers on top so that they can eat the fodder while the holy ones do a little weed whacking below.
Go for red, cast liches up to around 1k liches or so, get another 20-30 ice elementals, then get anything to bump the Ices down to at least 6th stack. The lower the better. If you can afford it, add on rippers.
This is my first time trying to do a "versatile" stacking, so any other comments from other blues is a good idea too.
==================================================================================