.....is there any good strategy for dealing with this one?
I'm finding that it's nigh impossible to do these in a lava flat, for one reason: the bloody dinosaurs. Either you get covered in those accursed raptors (and you *cant* avoid them because of the wind and room design), or one of those idiot Rexes gets stuck somewhere, and takes a bazillion hits to kill WHILE you get covered in raptors.
Basically, the mission just consists of 1: get covered in raptors, 2: die.
....in case you cant tell, not a fan of the raptors.
There are certain points where the Rexes will spawn too near the entry (like, 3 character widths away), and will proceed to waddle over to the spot you're on, and....... that's it. They stand there, they dont ever move back to the right so you can do anything. And you cant just go back to the previous area because the moment you move..... yeah.
The ONLY solution I've thought of that MIGHT be viable is to use the bat form with a really, really high health character, since that seems to be literally the only way to dodge the raptors, but...... every time I try this I run into a stuck Rex (and of course Mr. High Health Bat cant kill even one). And then I get covered in raptors.
Wind Shelters and such being what they are, this problem doesnt exactly get me stuck, but it does mean losing that shelter (which was specifically placed to make a couple of Shallows areas easy to open up).
I swear, those raptors are my bane. Bloody things......
This is one of those "seemed like a good idea at the time" things, yup......