Mucking around with a baseline route for Boktai 1, and I ran into the issue that Delusion Forest can't reliably be navigated at night. Also, can't run max sunlight all the time, the game still gives overheats after spending so much time at max; maybe spend dungeons at 1 and only use max for purifications and finals.
Here's what's available so far.
Uses Prof. 9's Solar Sensor Patch; this resulted in the following hashes:
SHA1:0D3A978EA8FB02A356B98DE51E7AB07BD1AAECC0
MD5:50411EC2A648DA081DABEE3162FC7DEF
Notes:
Went through Catacombs to pick up the Beatmania frame to make Monsters-on-weight-switch puzzles more direct (thus far there's only 2, both in Bloodrust Mansion, but BM trivializes the first one and the second one you need stunning to do anyway)
Picked up the Lance frame in Crumbling Mine; there's probably a faster route to Firetop Mountain (and probably better weapons to use, with how the Solar Piles work during Purification) but I like this type of "Gun".
Because Garmr plugs up the hole that the sunlight comes down through, it's considerably faster to do Muspell first; even without Permafrost forcing you to take both paths on a round trip, it takes longer to do Garmr without the Flame Lens than it does to do Muspell without the Frost Lens (to my knowledge, there aren't any useful Frost Lens-only paths in Firetop Mountain)