For bulking it would be cjc-dac with mk-677. That is just a basic stack. Now for better results I would add in lr3 (in burst cycles). Plus some PEG MGF a few times per week to assist matters.
Obviously for optimal results you could add in hgh and slin and swop a few things around. All the peptides I have mentioned though are the elements I would use but order and timing can be played about with.