I am prescribed TRT of 150mg/wk but I run it 200mg/wk. So, I assume that you are asking "Is it ok to occasionally run orals when I am just on my TRT dose of xxxmg/wk?" As long as you are allowing yourself the requisite breaks between cycles, even if just adding orals to your TRT dose, you should be fine.
I think the real question is "why?" orals with a TRT dose of Test (100-200mg/wk} seems like kind of a half-ass cycle. I would rather run 1-2 well thought out cycles per year, of which there are plenty of examples on this board. In the time between cycles, you would probably get as good or better results by trying out the various SARMS stacks.
Good luck and be safe.