IMO, Yes...Absolutely on some, like AI's. Have others on hand like Nolva and Prami. No reason not to. Cost is minimal and the stuff lasts forever. AI's are a must. They help with BP, Prostate, everything. And you don't need those problems. Other ancillaries are not so good being taken all the time. Save them for "as needed"...Nolva, clomid, Prami for ex.
Make sure they are well-researched. Aromasin for example, instead of Adex for cholesterol purposes and no-rebound. Prami or Caber for progestins (as needed on these). Nolva. Shitload of B5 for acne if it pops up.
There are things you don't see that occur from gear use. Solve problems before they arise..."A ounce of prevention is worth more than a pound of cure", right?