@maxb: Yeah, I stopped trying to go flat out and just do it at pace to see how much time I'd need to shave off. Getting a snake pit level and taking the mattock to create shortcuts cost a bit of time up front but pays off big in the jungle and temple. Ended up getting to Olmec with 1:32 left, screwed up twice but managed to survive and finish with 22 seconds to spare.
It's been a good week. I got 100% trophies in Spelunky and GTAV. Maybe I'll tackle the last one in Dark Souls II next.