Stack objectives instead of grinding blindly
Fast leveling works best when every trip solves more than one problem. A capture route can also gather Leather, organs, or future breeding parents. A mining route can also prepare Refined Ingots. A boss route can also support Ancient Technology planning. The key is to make experience arrive while another blocker is being solved.
Use captures when they support the next route
Capturing new Pals is useful when those Pals become workers, breeding parents, mounts, or combat options. Do not capture randomly just because it gives progress; aim at the Pal types that support the next base, resource, or breeding plan.
Let base progress carry part of the leveling
A stronger base reduces downtime between leveling routes. Better workers, cleaner storage, stable Cake, and reliable ammo supply make each active session smoother. Leveling feels faster when the base removes repeated chores between trips.