Understand the complexity involved but as someone who has plans to add a new rifle in some DG category, I feel you need one scope per gun unless it comes pre milled from factory like Rigby/Mauser for pivot mounts. For a DG to me best is Iron sights as you hunt close, but then why will you need more than one scope ?
For the large, dangerous African critters I’d hunt “close” with my .404 Jeff, “close” means none would be beyond 100yds. If they are, then you and the PH need to stalk closer.
In turn, that raises the question of what’s the appropriate zero for “close” hunting?
For iron sights, I use a 50-60 zero, and then vet where POI is with the same load @ 100yds. Remember, you’re not hunting squirrels or prairie dogs. Elephants, buffalo, rhino, etc., don’t require sub-MOA precision. Trying to zero your .404, .416, or .458 rifle for an MOA @ 200-yds is arm-chair fantasy and unnecessary and, worse, a waste of factory ammo.
For “close” hunting of the same game with an optic, for me that means either a very low fixed-power compact scope (nothing over 3x) or a red dot.
Zero is initially 100yds, with more attention paid to where the POI is on the target at shorter range, like 50-60yds.