Tren and Deca/NPP is awesome together, but there are a few drawbacks. You MUST keep your estrogen in check or you will run into problems. Caber and Prami is a must. Also, 19-nors shut you down quick and hard and can be a bitch to recover from. So running 2 of them can make it worse. But, if you can handle it, then it is just about the best stack you can do.
As far as the caber dosage goes. You don't really need much more. Keep your dose between 1-2mg a week.