depends on how much test your using when it comes to your decca, if your taking 800mg test per week, id go with 400mg decca, if your taking 1000mg use 600mg decca etc... use dbol for first 6 weeks to give u a nice kick start 25 to 50mg ed...
i think test400 is shite, make sure u mix each shot with the decca, that stuff realy stings, far too strong per mg per ml