best supplements to use during PCT

I’m not looking to pull punches I definitely want to keep my gains from my cycle this time
last steroid cycle I did I gained about 10 lbs but I lost almost all of it when I came off
this time I’m going to run a similar cycle I’m going to be using Deca and testosterone but I want to keep my gains
what are the best supplements that I can use during PCT and after to hold on to most of my muscle and strength?