Darish Vol vs Valkorion

-round 1: Vol can use mnemotheraphy 
-round 2: normal fight.

Valk

Valkorion.

Valkorion.

Valkorion, obviously.

Valkorion

Yeah probably Valkorion.

Valkorion wins solidly round 2. I would place Vol as a Yoda level combatant at best, and he can’t compensate with lightsaber skill because he has no feats in that regard. However, the fact that Abeloth could not stomp him, which was, at least partially, a result of his power, leads me to believe that Valkorion isn’t going to stomp.
Vol probably wins round 1 based on the effectiveness of Mnemotheraphy, which even when used carefully can deal great damage. If Valk somehow menages to defend then he wins.