Ages ago I was told that Tomei cams don't need to be dialled in and should always be set to zero ...for RB25 Gtst's.
This was after we dialled in [from memory 5 degrees [could have been 10, it was 20 years ago]] and it ran like shit. Asking around everyone said to set to zero and it will work.....we did, and it did.
I could be wrong for your motor, but if you don't see gains then zero is your answer.
But Dose Pipe and GTSboy will know more.