Agoge (14) (17-3)
Colonization (22)
Urban Planning (15) (14+1)
Agoge: I'm not going to stake claims that I'm the best player or that I make the best decisions, but to me this card isn't generally useful. For a Domination player, it's something that should practically never leave your Military slots, but for anyone else it gets a bit more situational. Outside of Domination, the other use for this would just be to collect a defensive army, but I find you're much better protected with walls, garrisoned range units, and friendships than you are a cluttered army of anything else.
Urban Planning: TL;DR- Production good. But for a real explanation, every bit of production matters. And if you're going wide enough, then collectively this single card gives you plenty of free production. It's kind of stupid, actually. This card is unlocked right at the beginning, and unlike other starting cards like God King or Survey which are either instantly tossed aside or were never worth it to begin with, you can justify using Urban Planning multiple eras after it was unlocked. If Urban Planning is this good, then God King should really be given a buff to compensate. A measly +1 Faith and Gold for a single city is insignificant compared to the always-useful empire-wide production that Urban Planning grants.