What and how you bulk depends entirely on diet. Deca will put the weight on you, quality of that weight depends on what you eat and how you train. As will tren, but judging by this question I highly doubt you're ready for it.
How much less mass do you think i can obtain?
12.346 lbs OP, you've not given any information so that we could even make a wild guess to that question.
Go research until you can answer these questions yourself
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