I think it is worthwhile to do reverse wrist curls and some shoulder stability every time. Partly to engrain the habit.I'd do it as part of the warmdown, as the higher psych levels in the main circuit arent appropriate.For shoulder stability i currently like: external rotations (lying on side w dumbbell is ok, theraband better); sphinx (12 reps holding each 3s at top squeezing shoulder blades down &together); kneeling alt arm/leg superman; bent over reverse flyes. Those are some that I still do regularly from my 3 months of expensive shoulder physio at the start of the year :-)Shoulder press (or clean& press?) and shrugs also great in the main circuit.One legged deadlift might be a good addition to the circuit.I should caveat the above by highlighting I'm a complete punter (os 6c / rp 7a). Sadly i am something of an expert on getting injured and rehabbed, especially in the shoulder dept, having done it 4 times over the last 10 years (I'm a slow learner!).
i use to do a short circuit training to end teenager climbing classes, mainly as they seem to enjoy getting properly smashed and otherwise they would just sit looking at their phones...i also do something that could vaguely remind a circuit training at the end of some bouldering sessions, mostly when i'm fat and far from peak shape - though not really something structured. exercises i like in either or both situations:-anything involving a physio ball-TRX style messing around with ropes-turkish getups-one handed snatch-any kind of burly climbing-like moves with jugs and good slopers, no feet.-burpee+pullup combo (jumping to a pullup bar)-jumping at some wooden balls in front of me, swing forward and try to hold the back swing as far as i can before slipping off.-basic exercises on the floor