1 Will Survive 2

How to beat lvl 6: Build Keep, Barracks, Blacksmith, Monastery Chancel and Castle in that order. Upgrade Monk and Captain. Create 4 Monks and 6 Captains. ATTACK! You must build everything as quickly as you can click it. Do not speed up the game play. For some reason that messes it up. I did this with 2/3 Economy and 2/3 Military with 1 tech point left over (So you will end up with 3 to max out Economy or Military for the next level). Guaranteed 5 stars and you won't lose a unit.

I agree with other posters. My frustration hit on the limited gold one and being at the enemies base and all of a sudden they instant spawn like 10 guys. There is no fun to be had with a cheating enemy.

good game just to easy to get stuck in an endless battle. I dont mind the AI building faster, gaining money fast ect. just put a population cap on them and dont give them a boost to troop deployment speed once you get close to the gates.

Where do I train to get the Perks that the AI has like unlimited gold, instant troop deployment and no population cap?

Priest/High Priest: Most important unit in the game. Very important on the level with a gold limit. This is because healing doesn't cost anything. Dead units cost money to replace.
Footman/Maceman/Captain/General: Almost the same, stack these to protect the back.
Knight: Almost worthless, runs out and gets killed fast. Useful only as a more powerful maceman, for killing large stacks with monks.
Ranged: Generally the same, only good for a little more power to kill large stacks.
Strategy: Just train lots of monks and a couple infantry to protect them. This stalls when the enemy does the same thing. You will then need ranged units or better infantry. However, as long as you have enough monks to keep the front line alive, this can be kept up forever. Also, it's free, so you can use your gold to upgrade.