new playthrough with same friend, a couple days ago i tried something similar but stacking jump with potion of glorious vaulting. iirc it's a custom game but with honor ruleset (so we're not on single save). the potion ended up canceling out the jump spell. i want to say any case of two different affects achieving the same thing (such as enlarge+colossus and jump+vaulting) don't stack in said honor ruleset, but i'd need to check some more
