deca durabolin/NPP effects both estrogen and progesterone receptors. that's why guys get bitch tits from it. testosterone aromatizes more heavily then nandrolone does, thats something you do not hear often from online guru's... but the dirty secret it is they hits both E and P hormones so it can be a bitch to deal with.
you need to run an AI with any aromatizing compound regardless.
if you keep your estrogen in check you will keep your other female hormones in check as well.
caber is great, but it only effects prolactin. you can't use caber and expect to prevent estrogen related sides.