Essence is the stuff that undecays. Improvement and growth is the opposite of decay.
$$$
Price Check on simultaneously propagating the Seraphim, Cherubim, and Ophanim to 1 Million each?
Price check on propagating just the Seraphim to 3 Million?
Price check on attuning Seraphim to Ritual Magic(not the sacrifice kind, the 20-mages-in-a-circle-with-runes-and-shit or the working-together-for-like-a-month kind)?
Price check on protective Obelisks built around/in the cities of Good, working with the Seraphim/Cherubim to protect the cities from basically everything(disaster, plague, teleporting angels, non-teleporting angels, Megabeasts, nuclear weaponry)? Kinda like a forcefield, when directly protecting from massive impacts or the like
Price check on that plus fortification architecture/building the obelisks as part of the walls that grow with the city with the help of Khaziraad and/or Joha?
Price check on making the cities 'living' so that they naturally grow and expand to accomodate the inhabitants, and price checks on that with the help of the mortal mages(as previously described and shit), Khaziraad, and/or Joha.
And when I say working together with the mortal mages, I mean that I'll provide the power directly to the project; they give what they can without burning out, no more. I don't want them to burn out; they're there for the precision work and cooperation benefits.
Goodness does love it some Cooperation, after all.