Your question should read, "How much muscle can I gain on this cycle?".
Any anti-e's in there? If not you are going to be disappointed with this cycle. 13-14% bf is on the high end without a STRONG dose on anti-e's.
With a higher bf% you make more aromotise (sp?), thus converting more of that test and deca (yes, deca converts although not nearly the rate that test does) to estrogen. And as you know, estrogen likes to layer on the bodyfat. 7 lbs in 9 days is a warning sign. The first thing estrogen does is retain water.
Hope you are doing cardio too.
Good Luck with the cycle- LA