Deca and Tren are the absolute GOAT. If you want to run a shorter cycle, pick shorter esters; that is the key. If you want a longer cycle, then go longer but I wouldn't run Tren more than 8 weeks or Deca more than 12 weeks.
When it comes to gyno, you must have AIs on hand. It's very important. It's a good idea to start running them from day one, especially if you're using compounds that aromatize, such as testosterone or D-Bol.