You'll need more accuracy.

Looking at your gear, unfortunately you're still severely undergeared for coil. Get some Darklight Accessories, a lot of them have accuracy. Also pick up the Darklight Cowl when you have a chance, you'll get a pretty substantial boost in your INT, and Darklight Hands give a decent amount of accuracy.

I'd reccomend running some other dungeons instead of AK for tomestones of Philosophy since there are other options like CM or Prae that you can run for the same amount. Switch it up so you don't get burnt out on one dungeon.

Generally a good rule of thumb is full darklight before thinking about Coil.