Coil is the currently hardest endgame dungeon. It's where you can get level 90 gear. Also, as far as those stats go, your bigger priority is "which gives me more intelligence and/or weapon damage?" which will likely be the item at a higher item level. You don't really need to nitpick about the lower priority stats until you hit endgame where you may have 2 or 3 options for a given slot at the same item level.