tl;dr: No, either can be taken in whatever order.
I don't believe there are any regulations surrounding the order of the tests being taken. I personally took TBAS at an AFROTC detachment THEN AFOQT at an ANG base. If there's a required precedence then they probably wouldn't have let me do that. I took the tests the earliest times I could get them scheduled and I would suggest you do the same if you are ready to roll. There are no advantages that I can think of for waiting, your AFOQT performance shouldn't be dependent on your TBAS performance and vice versa. That said (assuming your TCOs submit the test to Randolph correctly and timely), you won't get your PCSM without your AFOQT scores. I do know some test centers won't schedule you for TBAS until you have taken AFOQT, for whatever reason.