Cassian is awesome with Jyn. His first special drops the debuffs that lead to exposes under Jyn lead, then his second special takes all the debuffs from the whole team and sticks them on a single target. Sometime that leads to 5 or 6 exposes on that target leading to a one hit kill from anyone.
On defense K2 is better to have than R2. I have also found when I sub B2 in for K2 I drop less overnight, and I don't think its because he is actually better than K2 but I think more people think of B2 as a pain in the butt so are more likely to avoid me.
