Originally Posted by
Megas
I mean, I would actually think that ya, Lancer would probably show himself to Rin in the event Shirou dies. If Lancer knows about the snake trick going in from Rin, I actually don't think they'll lose.
Basically EMIYA, Rin, and Cu knowing about the snake trick vs Medea, Kuzuki, and Saber seems like fairly good odds for team Rin to me.
An EMIYA not intent on betraying might try to convince Rin to approach the situation in a way aside from direct confrontation as well, but I'm not sure what he could come up with.