well if you read the last like 2 posts one guy emailed the creator. Looks like the last switch is under bombsite A. Its almost like you have either NoClip to get it or teleport in there and do something at the last second. Since we have a WCS server we do have ways to get in there probably without blowing the site up. Cant Santa and other races fly fast enough through the map?
You can always decompile the map, run it in hammer, then figure out where the triggers are.
With both teams working together:
One team Molocule, Other team athena. At the end, have mol bubble and then athena freeze him. (level 1 ulti best). At the end of athena's ulti, mol can move, and with bubble, mol survives. Probably a WEE might faster than having to be out of range of being killed and flying in
Or just buy the invuln pot or shadow hunter ulti. Still probably faster than flying in, and doesn't require cooperation. Using these require not miss timing (a much closer required timing with just mol ulti). If you DO want to use santa, probably want to get ground bound, via ladders(don't remember one there, but I could be wrong) or athena/night elf ulti. Don't know if bash and such do it too, can't recall. That reminds me...