He isn't gonna fuck anything up by not taking test, let's not be ridiculous. And taking test isn't gonna stop you from being shut down as test and dbol together would shut you harder and quicker than dbol alone. PCT is the most important thing to have in place. If you have a thorough one ready you can run almost anything ( i wouldn't run deca) on its own. I've did dbol 3 times alone before i ever did test, primo, eq or anavar and I'm completely fine and i was then too. He is probably gonna run the dbol no matter what ( human nature), so lets at least inform him of his possibilities. PCT is the biggest factor, have a good one and you'll be fine