For anyone interested in becoming Knight of Humility, I have discovered its very easy to gain doing a rat spawn. You can become Knight with just one run in this spawn. Just try to keep the spawn at the lowest level possible, since you cant invis.
Read up on the rewards of being knight, and what it does is gives 30 hpr on pet. This would mean you wouldn't need to heal pets during vvv.
You do know that you can't hide or stealth if your pet is under humility buff , right?
Well if you use Taming Mastery you can´t hide anyway.
:)