IMHO, your bf% is far to high to begin using any kind of AAS....especially deca.
You should have a far lower one if you have ,"10 years of consistent training experience". Fix your diet, get a better training program, lower your bf% to the lower teens before even considering use of AAS. You will get conflicting advice.
Diet is key...yours is broke. Post your diet up and some of the diet pros here can throw some better advice for you in terms of fixing your diet. Good luck.