what specifically are you looking for in terms of suggestions: nutraceuticals, nootropics, pro-steroids, thermo's?
For me personally: r-ALA + ALCar + GT extract are year round supplements. This is my foundation base, everything is secondary depending on goals.
BTW, 7aa-OHN is already available, but I heard it needs to be injected, for otherwise its bioavailable yield is extremely low (like 4-5%).