Fortified Point - credits to MrSevenX

Legend:

Level: The level of the fort
Cats: Catapults needed to win
Resources: the total about of each resources each fort holds
Infantry: infantry needed to take all resources in one attack
*cats: the fort has catapults as well!

Forts
Lvl - cats - resources - infantry - *cats
1 - 215 - 50k - 2000
2 - 428 - 60k - 3000
3 - 855 - 80k - 4000
4 - 1410 - 100k - 5000
5 - 2170 - 130k - 6500
6 - 3782 - 160k - 8000 - *20
7 - 6255 - 200k - 10000 - *50
8 - 8708 - 300k - 15000 - *80
9 - 14115 - 400k - 20000 - *150
10 - 19830 - 500k - 25000 - *300

*Numbers based on the "10% Rule"*

NOTE: when farming I find the best way is to command all your troops to "wait" from round 1, if you have the recommended amount of catapults, they will be able to kill them with no losses.


Sequence to attack (Wait all the way, except if only cats left)

1. Cav (they should all die, else round 2 is also cav)
2. Inf (surprised? archers not in range yet)
3. Archers
4. Inf/Cats (depending on shooting tech, anyway if you target cats and they are not in range, it will automatically attack Inf)
5. Inf (if there are no cats left)


Remember: every major title upgrade, or every 3 levels, you can hold 1 more sub city and 1 more fort, also, the amount of oasis you can hold is: Your level divided by 2 and rounded up if needed.