If I correctly understood your issue about recording in real time/no latency with all the effects, you could try enabling the automatic disabling of effects that add latency when a track is record enabled, of course the singing performance is not going to be the same as recording with all the effects on (the setting is under Preferences/Audio in Reaper).
The combination of the synths? and voices really is a nice full texture, it's powerful sounding, but compositionally, it gave me a nice sort of an ethereal and otherworldly feeling, the same kind of feelings i get from the music of Lothlorien from the Lord of The Rings movies, so I think you nailed the feeling of grandeur 😄.
The track kinda cuts out before the reverb tails have time fully decay, but you were probably in a hurry to get this submitted, just wanted to find something to nitpick about so this comment is not too positive 😉
Good work!