Do you multitable? I generally play 50% more FR tables than 6max tables at one time. So if I'm playing 4 6max tables at a level, that generally means I can handle 6 FR tables. This gives about the same amount of decisions / minute.

Other than that, it's about whether you can adapt your game. But you seemed in your OP to know that and think it was possible. So...good luck. Let us know how it goes.