I have a Rexobone I’m just not sure what to place around him is there any monsters I’ll come across in game that are worth building around him?
Rexo goes well with monsters with the move give turn or team turn, as they let him get multiple moves off.
Also monsters with stun absorb and protect teammates make good partners.
I say monsters because there are several options for both of these, so experiment around and see what you like using.