Okay, guys... About the Production thing...
I dunno if it's like this for Kingdoms... But any level 4+ Empire city can get the ability to produce units in one turn... Quick aside, if I seem condescending... Well, it's because I'm being just a little condescending, but only because I can't believe none of ya'all have figured this out. Back to the point; If it -is- like this for Kingdom's, then it would be Level 5 Cities only, as that's the level required for their last Troop Training building.
War Council: 25% Production Speed Bonus. (-25% Production Time if that's easier to read for ya'all.)
Garrison: 25% Production Speed Bonus.
Warrior Temple: 50% Production Speed Bonus. (I -THINK- that's the correct building... I'm not really sure... I've kinda been away from Elemental from a while now... Just bought GalCiv2 w/ Dark Avatar...)
Total Boost: 100% Time Spent Building ANY Unit You Can Conceive Of: 1 Turn
Knowing the Empire Conquest Tree like the back of your hand because it's all they're good at: Priceless
Before anyone says, "Yeah, but-" don't. I know what some of you will say. Those bonuses are additive, not multiplicative. It really does get to exactly a 100% decrease in training time, at least for Empire's...
Like... Seriously, how do you guys not know this? Do ya'all actually try to win NON-Conquest Victories as Empire's? For real? Nothin' against ya if you do, and if you can actually make Spell of Mastery or Diplo work as an Empire, all the more power to ya... But they're Empires... To Quote Conan the Barbarian making an abridged Genghis Khan quote:
"To crush your enemies, see them driven before you, and hear the lamentation of their women." This, in my mind, is the only Philosophy an Empire needs. Ever.
Edit: And if you're only playing Kingdoms... Well... I can see that... Because, you know, they're actually useful for more than just Conquest... But still...
Edit Again: Oh, and btw... War Council and Garrison only require a LEVEL ONE city. How ridiculous is that?