Secret Finder is bigger than Collector. The gems still matter, but the all-secrets route feels broader because it mixes hidden routes, side objectives, and the kind of permanent progress that is annoying to rebuild after a reset. It usually goes much better when the run has a clear order instead of turning into "walk everywhere and hope the badge appears."
The Hotel is the stop that usually makes the whole route feel easier. The fourth-floor room leads into Frozen Magma, and Frozen Magma is what opens the lava-pit hidden route cleanly. Starting there gives the run an early anchor and keeps the Hotel from turning into a messy return trip later. Once Frozen Magma is in your hands, it usually feels best to spend it at the main base lava pit right away instead of carrying it around and letting the route get distracted.
After the lava path, the Hotel still has enough value that it is worth staying there long enough to finish the level-gated part of the area. The Level 3 route tends to feel much better as part of the same visit than as a separate trip later. If the save still needs that line, finishing it while the Hotel is already open usually saves more time than wandering off and coming back.
Once the Hotel is settled, the route opens up. Castle Mountain and its well maze are one of the big late-map secret checks, while Frozen Canyon fits naturally into that same broader completion pass. The run usually feels better when the path-changing secrets come first and the larger cleanup comes after.
Rebirth is the other reason the order matters. Secret-heavy progress feels especially bad to abandon halfway through a save, because so much of it overlaps with gems, exploration checks, and one-time route progress. If the Hotel room, lava path, Castle Mountain well, or the last cleanup is still hanging open, rebirthing usually turns one nearly finished sweep into two separate grinds.
The route usually feels smooth in this order: Hotel fourth-floor room, main base lava path, Hotel Level 3, Castle Mountain, Frozen Canyon, then whatever broad cleanup is still left before rebirth. When the hidden-route pieces are settled first, the last Secret Finder check tends to feel much less chaotic.