the issue lies in the fact that tren does not convert. So once your HPGA is suppressed you could see a "near tren only system", which can have some unpleasant sides. With AIFM this should be offset (at least somewhat) by the DHEA.
though using an AI should also keep suppression from happening as quickly, though that is not a certainty. basically its going to depend a lot on individual response and underlying hormone status.