I would still nerf coil. for example T2 SE could reduce the dmg of rot rather than make it an instakill, reduce the duration or paralyze on a missed silence or reduce the rot debuff so u can make the pass rotation 3-4 people instead of 5. Any of those changes would make that particular coil more casual friendly. Leaving it as is an instakill mechanic is still an instakill mechanic no matter your gear. If they do nerf coil in 2.2 like they are planning to the hardcore will all be beyond this content anyways.