What do you think about this army composition? Can we take out the hardest AI?

I'm playing against 7 hardest AIs, free for all, ludikris map size, 500 pop limit, black forest.

After a long struggle I already took out 2 AIs myself and I'm about to send this epic army to hopefully take out or at least cripple the strongest remaining AI.

This is the 500 strong army I composed: http://oi66.tinypic.com/168sd3b.jpg

I'm playing with Slavs but I converted a lot of marquee units from my enemies, that's why I have an entire detachment of cataphracts as well as some woad raiders and a few huskarls and Teutonic knights. They realized the error of their ways and joined the right side. :)

And this is the enemy (Teutons) we have to take out: http://oi63.tinypic.com/11rwrjt.jpg http://oi66.tinypic.com/2602vlh.jpg

Plus they have like 10 more castles and endless resources. Fortunately for me they're just attacking another AI right now so they are a bit distracted.

The plan is to march my massive army over the huge map and try to take out the castles quickly with trebs and then use the monks to convert as many of them as I can and then use their own troops against the rest of them. This plan worked with the Byzantine AI as you can see from the army of cataprachts I managed to convert. These tanky Slavic monks can take a lot of punishment and are a real game changer. When you have a group of 20 of them they're converting unit after unit really fast and in a 500 pop limit game it's easier to protect them. I don't know why the AIs haven't researched heresy but it's good for me.

The reason I don't have onagers, scorpions and rams is because they're too slow and awkward and hard to maneuver in these 500 vs 500 clashes where there is such a crowd. They either block your soldiers or end up way behind where they are of no use. Trebs are better because of range so I prefer them. Also, the AI doesn't have a lot of archers to worry about.