Questing knights might profit from 12 in a 6*2 fashion like our white wolf knights but other than that the lance formation is THE nasty nasty thing in 8th.
After the first round of combat, Questing knights will indeed be better off in 6*2. Although, price-wise, I presume 3*3 will be more accessable.
What I reckon I'll do is use Questing knights as detachments to large, lanced formations of knights of the realm.
KKK QQQ
KKK QQQ
KKK
KKK
So, you smack the KOTR and the Q's home. The K's for the rank bonus and the Q's to maintain killing power in later subsequent rounds.
Taking it one step further, if you can't get a flank attack in (probably unlikely due to large blocks of infantry), it will be worthwhile charging the Q's home one round later than the K's.
The lance formation will work a treat. My problem is what to do with the pegasus knights. All they're gonna be good for is warmachine hunting.