My regular opponent uses a pair of them and they are real headache
Ouch! My sympathies

@ captPiett I agree that Dragon Ogres can do the job

, not so sure about the flagellants given the chance of only one stand fighting and no armour saves, but if the Dragon Rider were already wounded they might be a dis-incentive.

Knights joined by a terror causer (hero on Griffon) seem to be the Empire's best hope and as you point out the chances of either surviving the combat + subsequent counter-charges are not high. Nevertheless, that seems reasonable given the cost of the dragon. The problem really lies in the DR's range. Even if I deploy well, he will simply home-back to a new position, then initiate a regular/flank charge on almost any formation he wishes, meaning I'd have to hold several units of knights back as bodyguards, and pray that after eating a brigade from the flank (with an advance charge), he doesn't fall back far enough to be beyond charge reach and that my characters don't botch the orders.
My experience has been that the Dragon Rider used offensively will eat at least 4-6 units of Empire Troops, before I can really damage him, and while that is still not unreasonable in points terms, it often means that my army is half-way to broken before my 3rd turn
I guess one answer is to get my demons painted and return the favour with a Greater Demon!
