Hi Rahnz,

As the Mongols are primarily a mobile force, who wreak havoc with their missile archers, you need to get them pinned down in one place.

Forts are great for this. Not for fighting from within them, but for attacking an enemy who is stuck inside one.

Build a few forts around a good choke point, such as on the enemy side of a bridge, in a defensive arc shaped wall, with one good army behind them, sitting on the bridge.

The idea is that the Mongols try and take one of the forts. Keep at least one crap unit inside each fort, so the Mongols are tempted to try and capture it.
When they do, counter-attack with your one super army, using lots of flaming artillery.

Your counter-attacking army must be very big... if it's too small, the Mongols will be tempted to leave the fort and pursue you.. you don't want this.
You should be able to crush them where you want them... inside the cramped little fort.
In fact, there are even tactics that will help you block the fort doors, stopping them from escaping... Check it out.

I learned of these tactics from some very useful guys on here...


Fort fences:
https://forums.totalwar.org/vb/showthread.php?t=90411
https://forums.totalwar.org/vb/showthread.php?t=90433
https://forums.totalwar.org/vb/showthread.php?t=88889


Door blocking tactics:
https://forums.totalwar.org/vb/showthread.php?t=89611

Good luck