I would do 100mg(1cc) EOD, that will give 20 days. If at the begining then start it same time as the other stuff. If at the end, I would start 1-2 weeks before your last shot of the other. This way as the Test E and Deca are clearing (which takes a couple weeks) the prop will be working strong. The prop will clear quickly after the last shot, within a few days, so then you can just follow up with PCT and should be able to maintain alot of your gains.
KR