Tweeti like tren better deca is used alot for bulking and i have run fina ed at75 mg for 8 weeks with deca at 400 mg 10 weeks pluse test eth at 750 with no problems at all ,if you are looking for mass deca would be a great addition bro but run the tren at least 6weeks if ya can ateod inj you will be happy fina is also a great mass builder imho.