First time running Tren? If so, don't go with enanthate, rather go with acetate. Reason being is if you run into sides, which on Tren is high likely, and you want to stop then atleast the short ester is out of your system faster than what the long ester will be. Apart from that, Tren is Tren.
Most people rec. not to run Deca and Tren due to them both being 19-Nors so the likelihood is increased in running into Progesterone/Prolactin sides ... Whether there is any truth to that, I don't know but I'm sure it could be controlled with Prami or Caber if it happened.
A lot of people say Deca being a very wet steroid in that it holds water and makes you bloat and is good for all out mass, whereas Tren is good for lean, dry, solid mass the counter each other... Sure Deca probably wouldn't be apart of my stack whilst trying to cut because of that, but if your on a bulk I see no reason why you can't run either. Providing you keep e2 and prolactin in check as well as sodium intake, you shouldn't really bloat up like most people assume.