Mixing PROP to a Testenan/Deca cyle?

This is a 2 part question.

My friend and i are both on the same cycle.
Testenan 600mg weekly
Deca 600mg weekly
D-bol 25mg daily

Question #1 Could adding prop to MY cycle help it, id it neccessary?

Question #2 My buddy wants to add fina to HIS cycle....I told him for what, ur bulking and thats cutting. I want him to read it for himself, he doesnt trust me...

You can add test prop at the end. Some ppl do that so they can go into clomid 3 days out instead of 3 weeks.
Tren can be used in bulking or cutting cycles. Tren gives good strenght gains along w/ lean muscle. It's good in either cycle.

So in ur oponion, the prop i should probably use at the end. Makes sense for the clomid. I really dont need anything to kickstart the cycle, because of the D-bol. Would u agree? Even though my friend is bulking, mixing it with fina which is good for cutting, wouldnt be a waste????

Wait is it safe to run tren and deca together?????