3 Rivers Archery has a spine calculator on their site which works well to get you close on spine for about any type of shaft/bow combo. With your setup, I'm coming up with a wood shaft spine of 140-150 lbs for a 32" arrow and 250 grain point.
All of the wood shaft suppliers I'm familiar with top out around 70-75 lbs which will be too weak at 72 lbs draw weight with a 32" arrow and 250 grain point. A quick search for heavier spine wood shafts turned up Forrester Wood Shafts. Never heard of them before and have no idea if they're legit or where they're located. Their site shows wood shaft spines over 100 lbs, so may be worth looking into:
https://forresterwoodshafts.com/col...rrow-shafts-23-64-diameter-spine-120-180
