A few things.
1. That necky is ungainable since its from Arc rancor event boss and they wont start that due to the amount of stress on the server.
2. Cloak and Adorn dont exist.
3. Unless you have 22k USD to spare, you'll never +12.
4. You say +26 atk lvl more which sure is 26% more dmg, but only 26% more damage against someone with 0 atk lvl, with all the new gear coming out people will get more atk lvl. So putting atk lvl/def lvl stones is useless, always has been and always will.
5. 99% crit rate is the highest.
6. You still dont have much atk speed gear
http://pwcalc.ru/pwi/?char=09cf6b153e5c59bdThis assassin owns your current, Since you only had just over 1 atk a second with 9k dmg, this has 7k with 2.22 atk speed which means 14k dmg per second. Couldnt find that 95 lunar grade cloak with atk speed on so i used a weird orange one, you get the point tho. I win :D