There is no unique civic or tech for the Empyrean (in “shadow” some other religion specific civics and techs have been removed). Their most powerful function comes from their shrine, Dies Diei. Dies Diei founds the Overcouncil.
Warmongers that simply want to capture the nearest empire (regardless of their alignment or effect on diplomacy) will probably find it difficult to tap into the Empyreans true power.
Are we there yet? Are we there yet? Are we there yet? Are we there yet? Are we there yet?Each release this request comes earlier and earlier.
building Chalid and/or one or more stacks of doom
Why the hell would you waste time with those stacks of doom?
'a ton'? you mean, like, 4 + 1 for Chalid? I guess Sheiam or Keelyn can get more, but that is a bit of a corner case (And seriously, Tebryn or Ozzy would get much better use from Death summons, since mages can summon pumped spectres too).