Spoiler Alert, click show to read: 
I usually play multiplayer LAN in EB, but I also get some M2TW experience....
(with patched version, if not, 2 handed units won't hit the Horsies)


With my Favourite Faction in each game

Vanilla & British Isles
England
Abuse your enemies with every kind of longbowmen! and get some Dismounted English Knights to kick their arse if they come close!... just made 4 dismounted English knights at the front, and let every longbowmen stand behind him (stronger longbowmen got outer place to protect against melee), switch off the skirmish mode, and watch your enemies fall easily... btw, plant all stakes on the ground, so massive cav charges won't make it... use two english knights as cavalry support
Scotland
Made a line of pikes using your highland clansmen, get some noble pikemen to guard their flanks, and get some highland nobles to help mop enemy line... just made sure that you got some archers and mortars, and just march to your enemy..... Better keep a feudal knight or two, as cav counter...

Crussaders only
Jerusalem
Use Marshall of the Templars as general unit in MP, then get the constables of jerusalem as support cavalry, get some templars and or tripolitan knights as regular cavalry, and use some squires and dismounted knights as line infantry... use templar crossbowmen as front line skirmishers, along with some moron of lebanon for backup archers, that's it... made use of your powerful heavy cavalry for close contact, with your bows pelting those saracens horse archers...
If you face massive Saracen troops, just use more moronites to give them spiky death...