[PvK]

Try summoning demons. You could have started out summoning Fiends of Darkness from the beginning. Enough of those, perhaps combined with blessed Eagle Warriors, set to hold and attack rear, can become very effective, especially coordinated with your other troops as decoys that don't have to do much fighting. Later, summon better demons and/or invest in a soul contract or two... then summon a flying demon leader such as with Horde From Hell (or others).

My Mictlan generally researches with Mictlan Priests equipped with research-boosting magic items.

Cross breeding can get some no-maintenance arrow-fodder and occasional interesting monsters.

Mictlan heroes are groovy. Don't accidentally set Mictlipoctli on fire with heat magic of any kind.

Mictlan has a nice variety of holy units.

There are some fairly powerful combat spells in Blood, too.

PvK