wk 1-15 Sust 500 GPL 1000mg/wk
wk 1-20 Deca 400 GPL 400mg/wk
wk 16-19 Sustaject 250 Eurochem Labs 1000mg/wk
I don't think you have enough prop to be able to add it in at the end of a cycle like a lot of people like to do. You could front load it at the beginning if you want to...I'm not a big fan of this, not out of concerns, I just don't see it as really necessary.
As for the cyp, you could run the cycle through wk 25 with the cyp you have left over, but that'll be up to you...at around the 20wk mark you may have had enough by then.