Capturing lv10 npc city

Nytro took a lv10 barbarian city yesterday. I have seen some of the battle reports, and here is a very general guide to how he did it:

His main base of attack was 1 mile away. He started with 5 attacks with 2000 warriors, coming from another city of his.
Those softened the traps, logs and trebs. Then his main attack came. 22k warriors, 35k archers, 19k ballista, 2600 rams,
2300 pults. Plus one of each other unit type. Then he followed with spam of 18k archers per wave, till he took it. It
took 49 attacks, he says, so 44 18k archer waves. The main attack must hit seconds after the warriors, and after that
no attack must hit more than 30 seconds between. It will be over in 15 minutes, so stay sharp.

If you do this, be prepared to lose it, and make sure you have enough heroes ready, and know how to launch attacks
fast. Of course, relog just prior, you don't want unnecessary lag.

Lv 10 barbarian towns are 100% lv10 buildings, 1 sawmill, 1 quarry, 1 iron mine, rest farms. No warehouse, one of each other, filled up with cottages. Very nice to have one of those, since it allows several tech's to be done to lv10.