When you are ready to blast, I would consider doubling the test, 400mg EW, split into 2 doses. You may need more adex. Test the waters and see but for a lot of guys, 1mg 2x wk would be enough. You could go to 3x wk with adex. I would run this blast for around 10 wks. If you would like, you can add in a small dose of an oral to help push your progress further. Something on the more mild side would be anavar, around 50mg ED for the first 6 wks of the blast.
Then when you are done, just dial your test dose back down to HRT and before you blast again, be sure to get labs