Quote Originally Posted by Ripken
What is the best/ quickest/ easiest way of boosting valour without getting streamrollered by battle-hardened MHC...?
The quickest way is by boosting your generals' valour. Make your two-star and three-star gens fight rebellions.

The surest way is to up your home bases to Guild level, build monasteries, shrines, etcetera.

A more intricate way is by using your low valour units on the battlefield in such a way that they gain valour. Whenever you can, you should give your lowest-valour units easy tasks to accomplish, such as flanking enemy units that are already engaged, killing off enemy stragglers or attacking weaker uits (e.g. by pitting your swordsmen or cavalry against enemy archers or peasants).