First, there's nothing "little" about this cycle... I won't touch the fact that you're only 20, but if you insist on cycling that young, here is what I recommend:
Definitely run an AI (aromasin or arimidex)... don't wait, start from day 1. You need an AI when running test and dbol.
I would run deca for 8 weeks and test for 2 weeks longer. I think 10 weeks of deca is too long, but that's my humble opinion. Why risk heavy suppression?
Don't jump on proviron right away if you don't need it. Feel out the cycle first and if you get "deca dick", then start running it. It doesn't take long for it to kick in.
If possible, use clomid instead of nolvadex. No need for both, it's overkill in my opinion (some like it though)... you run the risk of having more sides. It's been suggested that nolva and deca don't mix well (gyno issues)... clomid works nicely IMO... take only 50mg ED, starting 2 weeks after your last test shot...run it for 4-6 weeks.
HCG is a nice insurance policy for a cycle like that... either run it during cycle at low dosage or run it for 10 days at the very end of the cycle (500iu ED for 10 days), before starting PCT
Good luck!