I'm certainly no expert but I'll chime in here...
Dermacrine definitely helps with brain fog, if it's needed. DHEA and pregnenolone are neurosteroids and can help with energy/mood, focus and cognitive function. If your natural levels of DHEA/DHEA-S and PREG/PREG-S are low to begin with, the feeling of brain fog might be exacerbated while your body is under stress from a steroid cycle. DHT is also another hormone that plays a large role in mood and cognitive function. For some people who take DHT inhibitors like finasteride, side effects like brain fog can be quite common. Just some food for thought. Have you had a blood panel done? That would be a good starting point.
I am currently using Dermacrine and Maca root extract on my run of Ostarine/Arimistane. I can honestly say that my mood, energy and memory is the best it has been in a while.