Hi Jason,
You're correct, ANTS environment variables are overwritten by Typemock Isolator. In the general it's true that only one profiler can be attached, but we use Typemock Linker which enables running more than one profiler.
In order to make it linkable with ANTS it needs the environment variables of ANTS. I'll contact you by mail for details.
Best Regards,
Elisha
Typemock Support Team