[AdmiralZhao]

Going after the Jaguar Toads was a low blow. They might not be the best player on team Mictlan, but they've got heart. And except for the little toads, just about everything else Mictlan gets is worth summoning. Even the mass animal summon is good when you combine it with a double or triple bless. I would also defend the spectral infantry, as they were quite useful to me when playing as Lanka. You can send them out as a first wave, to exhaust the enemy heavy infantry or to hold the enemy in place while your archers do their work.

Still, my data set is somewhat more limited than yours. I'm sure there are plenty of shoddy summons I have not seen. Let me revise my statement to say:
"National summons, especially the holy summons, are usually worthwhile."