What's the midarm actually holding up? You should be able to do most things without much consideration. For example: relocate spring perches, outboard, get your travel dialed in, tummy tuck, body lift/raise frame mounts, etc. With careful consideration the midarm can eventually be added (that's my plan, anyway).
Over the 4th of July I just ordered 12” shocks from Fox for outboarding the rear. The front 11” are on back order till May they told me. I was going to do the shocks before the mid arm, but now I may just collect parts till I have everything to do it all at once.