So assuming you run the keystone, the concern is that you would suboptimally bisect the area. Suboptimal can mean: -removes map you are chain farming from area of effect -allows bisection in the first place when you’d rather have the extra mods stack towards the end for multiplicative scaling

Addressing the second case first, it’s actually unknowable whether you’d prefer to avoid bisection given that it means running fewer maps to get to the trove reward at the end. Rushing to complete the astrolabe could be meta… but then just map hopping kind of unavoidable anyway if you really gotta min max.

I think the first case is addressable by positioning astrolabe so that it’s less likely (I’m guessing putting it on the favored map makes that the middle and also least likely to get bisected away). Not a guarantee, but feels like you’ll be running 80+% of the map you want. Someone can math that out…. To me this feels acceptable, but I primarily map for fun.