The Trifecta though is Test/Deca/Dbol.
Most like to pair Test w/Deca as you can just keep growing throughout the cycle once you stop the dbol.
The risk you run using Deca without Test is suppression, potentially massive suppression if you run Deca for a full 12 weeks as is recommended. Deca stays in the system longer than anything else. Your PCT will likely have to be longer and stronger than with other forms of gear.
Running Test and Proviron alongside Deca and greater reduce the suppressing factor. Most will run test for a couple extra weeks after their last Deca shot then run PCT for 6-8 weeks if you did say 12 weeks of Deca and 14 of Test.
Personally I like Nandrolone very, very much. I am [was] not prone to heavy estrogen sides or shutdown [deca dick] so this never was an issue. For some it is so take heed. Again, having Proviron, A-dex and nolvadex with you from day 1 will keep you prepared. IMO only Proviron is a must to use from day 1 on a Test/Deca/Dbol cycle. A-dex and Nolva can be used when and if needed.