tren and deca stack is actually the perfect steroid stack
tren is your androgen, deca is your mild anabolic
make sure you add proviron to it though
the reason people say not to do it though is cause newbs SHOULD NOT! newbs should experiment with both compounds a couple times before putting them together. it isn't something you just hop on for a first cycle. tren should be saved for a 6th cycle minimum. hence it is sometimes better to just tell people 'don't do it'
i wouldn't recommend tren in the first place to 80% of guys. it is truly the relationship killer