The Gear Calculator is already updated with Patch 2.2 weapons and equipment! Awesome.
Check it out here:
http://www.ariyala.com/ffxiv/gear.html
(I have it set to Bard but you can drop down to any Job.) Seems not many pieces upgrade Accuracy so I hope the ACC caps for mobs in Coil Turns 6-9 are not too much higher than they are currently!
So the next step is figuring out where the Unidentified Allagan Tomestone drops from to upgrade weapons.
I don't see any process for upgrading from "Weathered Gear" - i100 to the not-weathered version - i110. It's quite possible the items required drop from Coil 9. Rumor has it Blue Gtr is already working on Turn 9. They may soon confirm that it is not possible to upgrade past Weathered until the next patch.
Please post if you find more information on the "Weathered" upgrade process!