In terms of adverse side effects, there is dostinex/cabaser for the obvious... for men that need to avoid associated sexual disfuntion or are prone to some of potential anxiety/depression associated with those compounds you listed, a boost of some quick acting test (prop) in the early stages of a cycle and to continue the test of choice for at least three weeks (four? better imho) after your last admin of tren/deca/npp is just intuitive, and as Radar attested, proven amongst many very knowledgable vets to be THE way to provide a smooth and comfortable landing strip as the tren/deca/npp leaves your system...
Why some men would prefer to just drop the whole game in one shot i do not know, I know many fellows who do NOT carry the test on for the 'comfort' zone period, but i dont any that can give me a REASON not to, and many, dare i say most? that CAN give excellent reasons to follow this road.