Hehe...don´t see why he would get ED from Sust. Dbol cycle.
HPTA is shut down like from any ester.
With a proper PCT he should come back unless he´s one of the few unlucky ones.
No reason why u shouldn´t keep your gains either. Keep up the cals. towards PCT, during, and after. And stay in the gym.
Don´t forget to wait 21 days after last pin for PCT.