Ideas for units/technologies... workable, or overpowered?

Just some ideas I was kicking around. Seems like the expansions have touched on most ideas, but... I was thinking.

Brigand: Unique unit. Mounted light cavalry with low HP and low armor, but get an attack bonus against villagers, trade carts, fishing ships, and lumber/mining camps. Takes less damage from villagers and town center fire. A little faster than scout cavalry. Less resistant to conversion.

Phalangite: Unique unit. Heavy infantry with spear and shield, specializing against cavalry (melee or ranged). While expensive and slower than the swordsman line, they do trample damage and have a slow regeneration feature if another Phalangite is within three squares. Lose to Teutonic Knights, Jaguar Warriors, and Samurai. Susceptible to onagers.

Hermit: Civilization bonus technology. Outposts will fire a single arrow upon reaching the Feudal Age, and gain slightly more HP per age.

Agnosticism: Civilization special technology. In the place of Heresy. When an enemy converts your unit, that unique becomes aligned with neutral/Gaia instead of turning sides. The enemy must then convert that unit again, from Gaia, to win it over. This essentially adds one more step for your enemies, and you can convert neutral units back to your side in the meantime with your own monks. Doesn't effect buildings; they still get converted in one step.

Sortie: Civilization special technology. Castles cause trample damage; that is, non-siege units attacking a castle with melee will receive physical damage at the rate of that castle's arrow fire.

Reconstruct: Civilization special technology. The player can convert one siege unit into another with a villager. So, for example, you can convert a ram into a scorpion, and so on, but you still have to pay the difference if the unit you're converting to is more costly. This allows you to switch up army composition without needing a siege workshop onhand, even if it isn't cost effective.

Theodicy: Civilization bonus technology. Monk healing rate/conversion rate increases depending on how many relics your enemy has. This bonus goes away if the enemy loses the relics or you capture them.

Eh... all I have for now. Criticize away, or add your own!