In that case Deca isn't called for.
If there were a joint issue that Deca helped you with, that would be the only reason I'd include it, and even then at lower dose, as this much is not needed for joint help.
If aiming for lowest side effects / lowest risk of side effects (not exactly the same thing) for given anabolic effect, then nandrolone (both Deca and NPP are nandrolone) should be out, for reasons you'll see backup testimony for here.
On trenbolone, also mentioned: Don't worry about the "19-nor" classification: It's about like classifyng water, alcohol, and gasoline all as "liquids" and making a decision about water based on what one knows about gasoline, or vice versa. Nope.
The only area where there can be a genuine relation is that very unfortunately, UG trenbolone has a high rate of being substituted or adulterated, and can contain nandrolone instead of trenbolone, as that's far cheaper. So nandrolone side effects can occur with UG trenbolone. With legit trenbolone, it's far preferable to Deca for side effect profile except for those who happen to be high responders to the increased aggression aspect, or who have sleep trouble, or who get night sweats.
I'd substitute the 300 mg Deca with Masteron or Primobolan, if I did not have trenbolone. Still another choice, also better for side effects in general than including the Deca, would be increasing the testosterone in place of using the Deca.