I find that adex is stronger than arom. Not sure why you're thinking that arom is a better bet. But either of them will work to do the same thing, reduce the conversion from test to estrogen. No real need for deca in a first cycle. Personally, I would want to learn how I recover from test first without deca. Deca can make recovery very hard post cycle, for many guys. The metabolites can hang around for a long time which can be a problem for some time.
As for PCT, you're probably hearing a lot of different stuff because there is no written in stone way to run these things. Here is what I would do. I would start your HCG at least 6 wks out from PCT, if not sooner, using it at 250iu 2x wk. This way, your body is forced to produce test all along and then when you are 2 wks post your last shot of test, I would cut the HCG and start clomid at 100mg ED for 7 days. This will get the blood levels of clomid up quickly. Then continue on with 50mg clomid for 14-21 more days