If you’re going to use the HMB, you’re going to want to take about 3 grams a day. I don’t know how many pills that is for your supp, but that’s the recommended dosage for possible gains. If you can return that crap and get your money back do it, then hunt down some 4-AD and use THAT to counteract the loss of libido (and lethargy) that you might experience on 1-AD.
You can choose to take creatine if you want to. It will increase the intracellular water retention even more, and the increased CP in your muscles could add to your strength gains. If you find that you are getting unbearably painful pumps in your lower back while deadlifting, squatting, etc… the first thing to do is drop the creatine. This is the reason that I avoid creatine in general. I also wouldn’t worry too much about minimizing sodium intake, since most (but not all) of the water you retain will probably be intramuscular in nature, although I suppose it couldn’t hurt unless you over do it and mess up your electrolytes.
I would still save the tribulus for PCT. With the added 1-AD, your LH production will inevitably taper off after a couple of weeks, and tribulus is just not strong enough to offset the suppression. However, when you go off the prohormone supps, you’re going to want to ‘kickstart’ LH production ASAP, and for that you’ll need large amounts of tribulus if you’re not going to be using clomid or nolva. You might also consider picking up Biotest’s ZMA supplement, which you can use all the time.