I am going to be running my summer bulking cycle soon. I cant decide to run Tren or Deca in it. This is what its looking like so far.

wk 1-10 Test E 500mg/wk
wk 1-8 Tren or Deca not sure yet the deca I would run 300mg/wk and the tren I would run 100mg EOD.

My question is will I benefit from running the Deca appose to the Tren? Im pretty much looking for something to help me keep most of my gains. I know I can make really good gains on the test alone but I just dont want to lose it all thats why Im running another compound. And how is everything else looking?
Thanks, guys