Test Enanthate or Cypionate, (Even Sust 400) used in conjunction with Tren at 150mgs EOD, with Proviron all through the cycle will effectively gain lean muscle mass, promote fat loss (with proper diet) and all but eliminates any aromitization of the AAS, which will keep water retention and estrogen related side-effects to a minimum at best.
Winny can also be used to further add androgenic activity for hardness.
There are so many effective AAS combinations to accomplish this goal ... I would say diet is a huge part of the equation at all times whether bulking or cutting. Often times the diet is the largest part of the change needed to make a cycle either a "cutter" or a "bulker".