Are 2 Bonus Items Junk?

Oh I just gave myself like 100% dex on my corsair calculator with apple and MW @ lvl 200. I think 8.5 dex seems reasonable considering how much dex I will have. When I just lowered my dex% to around 80% dex from gear, my dex to attack ratio became like 7 dex to 1 attack.

But that 7 dex is with the 80% dex bonus. 1 attack should actually be worth around 4 actual points of dex on your gear then. The 4 gets multiplied by 1.8.

What I'm saying is, an 18% dex cape is way better than a 15 attack, 9% dex cape. Not just 4 dex worth.