I am thinking of stacking

ZMA
Tribulus
Novedex XT

This after a cycle of other things...Is this a good idea??
I hear different things..some say antiestrogens and tribulus dont go well together and so on...please help...
I am 27...80kg..178cm (5 foot 10)...work out hard and eat 5-6 times a day with casein protein for sleep and whey straight after training..