I've just started a new chronicle in Kindred of the East (Blood and Silk) and one of my players plays a Devil Tiger. Now I have problems with his Dharma rolls. Kindred of the East Rulebook states (p. 53):
As your character reaches a moment of insight, make a resisted roll pitting the Virtue rating of your chosen Dharma against your P'o rating. Do so even if P'o happens to be the Virtue in question – there's a difference between mastering the Demon and having it master you.[… balanced …] The Difficulty of the roll is your permanent Willpower Trait; to reach a higher state of awareness, you must first triumph over your ego.
Later, it says you aren't allowed to use Willpower on that roll.
Am I right that you roll twice, with the same amount of dice, and hope that one of them is higher? (Resisted roll against the same Virtue). From the discussion in Flamma's answer it doesn't seem clear what difficulties to use. (both times Willpower vs. one time Willpower, one time Standard (= six))
What can a Devil Tiger's character do to raise his chances of advancing in his Dharma? All characters following other Dharmas (except the Scorpion Eaters) can simply raise their virtues much higher than their P'o rating and have a higher chance of succeeding in moments of insight (and acts of blindness). But whatever the Devil Tiger does, he'll always have the same value to compete with.
Edit: Some clarifications and extended the quote.