In terms of pinch hitting duty against RHP we have Lamb and PANDA (a switch hitter who is a bit better from the left side).
Against LHP PANDA is the best option with Adrianza also available.
You want more/better options against RHP because obviously there are more of them, but also our lineup tilts righty so opposing managers are more likely to have a RHP on the mound.
As a switch hitter with splits that are not too pronounced, I think PANDA is quite a good choice for the bench.
I also envision PANDA and Lamb playing some at third with Riley moving to right and Acuna playing center.