[Baalz]

Just tested this out and vs 20 Jags you do need a little more than 50 atavis for a likely victory, but not much. 80 seemed to work pretty good (skip the priest, those Markatas break immediately no mater what you do). Total cost of 720 gold for troops + 210 for PD + 50 for commander vs Mictlan's 500 gold troops and 350 gold commander.

Not bad at all considering the scale difference and the fact that all you lost was freely replenished PD. Throw in a couple guys spamming tangling vines or earth meld to slow them down even more and you should be golden.