Few questions ..#1 what is best way to tapper off ..

2 what is best to make gains lean or bulk

.#.3 doseing..#.4 best compound to tapper?
.test prop, tren ace , mast, deca
..im running test e 500 for 8week then bumping up to around 600 ...i kick started with dbol 50mg ed split 25m morni g an other 25mg about twevlve hours later tryinng to keep levels i whant to run the 600mg week 8-15 and tapper last four weeks ..plz help on what compound and doseing oral or injectable