Why the NO? Useless.
At 18, you should have enough test flowing thru you for six people. You don't need the trib.
You are taking No2 AND Xpand? Overkill--both have the NO in them, don't they?
Food is the best supplement.
The only thing you might need is creatine and a protein supplement. Whey is fine, but I'd add some casein protein in there, too, to take at night where the slower absoption will be of benefit. I use this sometimes and really like it. It is so tasty and it mixes awesome:
Nitrean
Oh, and keep the multi.