Always remember that the strength of your army is the Knights and their Lance formations backed by the Longbowmen of Bretonnia in their arrowhead formations. Deploy to take the best advantage of this.
One deployment that works well with the Bretonnian Army is the Eschelon formation: Deploy your most powerful Knights forward on a flank, with lesser Knights, Longbowmen, and Halberdiers deployed stepped to the rear from that flank to the other. This will give your Archers time to do damage with their arrows before the enemy can make contact. Make sure that each Archer unit is supported by Men-at-Arms. Use skirmishing Squires on foot to screen your heavier Men-at-Arms until the enemy is close. Arm your skirmishers with bows so that they can harass the enemy at all times. Use mounted Squires armed with bows to harass your enemy's flanks. Make sure to include a champion, standard, and musician in every Knightly unit. Use characters to strengthen your Lance formation's hitting power. Make sure that you give a magic standard to all your Knights units. Always give any unit that can have them a standard and musician. Don't forget your Knights of the Realm, they should be your backbone troops, Questing Knights and Grail Knights make good storm troops, but are exspensive. Knights Errant can be very useful against horde armies, but I would not use them in units of less than 12.
Always take the Lady's Blessing, and always include one or two magic users, they are very important to this army, as it has no artillary, and if you take allies that have artillary, you can not have the Blessing of the Lady.
A character on a flying monster is always a good addition to take cake of those pesky artillary pieces.
I know that this is very generalized, but if you take what is written above, and think about the make up and style of fighting of your opponent, and modify it to fit, you should have some success. The very best allies for Bretonnians are Wood Elfs and High Elfs, as they have complimentary troops.
Knights | Mounted Squires | ||||||
Skirmishers | Knights | ||||||
Skirmishers | Halberdiers | ||||||
Skirmishers | Archers | ||||||
Halberdiers | |||||||
Archers | |||||||
Halberdiers |