If you have higher E2 then you probably don't want to supplement with DHEA. Like Vince, I supplement with 25 mg of DHEA but I supplement a little higher with my Pregnenolone, 25 mg. I take at night prior to bed. I sleep really good. My DHEA-s is 322.8 and with the supplementation my E2 sits at 35.3 which I feel good at and take no AI.
The reason I take 25 mg of Pregnenolone is that when tested it registered <10 and I've read that the optimal range for a man is at 150 to 180. It has now come up to 41. It is also considered the Grandmother of all hormones and I am trying to back fill the pathway.