This is why the Reg Force needs to maintain high(er) readiness units, and PRes needs to maintain that 'baseline skillset' (not saying IBTS is the *Gold* Standard; there are many things that could be done to improve it Reg or Res force). SHTF, deployment comes up...the HR folks go. Reg Force *next ROTO* folks start trg and DAGing...assessments are done, decision made to augment with PRES folks...they start trg and DAGing. The PRes folks who want to deploy but not be Reg Force...well, they have to keep their fitness, medical, admin, etc up to snuff so when the call comes, they are the ones who can be *wheels in the well* the quickest.
I know there is a lot of talk about Reservists ''being bored with doing the same thing over and over, year after year" but I'll state again we have the same thing in the Reg Force too. But...we get paid to be ready to do job X in unit Y whether its Reg or Res. End of the day, that is what Joe and Jane Taxpayer are forking over tax dollars for us to be able to do.
Leadership, right down to the Jnr NCO level, is key to any unit being able to get out the door ASAP when the call comes. Reg, or Res.