I stuck to a few small groups this event so I can't fairly judge everyone's roleplaying, but my impressions of Cyn (even though I wasn't at the ritual casting I heard about it later) and Banradi and Taios were all very strong. I'd nominate/second all three of them. If forced to select only one, Radi, because he went through a definite period of adjustment after emerging from the Stone and his progression was very well performed.