As mentioned by others, coils are basically a story of their own. Besides, everything par T5 and T9 can be jumped over as is.

The reason why those two instances can't be skipped is to actually make sure you're ready for the content after it. They recycle some of the earlier mechanics into the new coils (i.e. Divebombs) with a twist making them harder. Besides, if it would be possible to skip past all the previous encounters, most people would just jump straight to FCoB for da lootz even if they couldn't quite handle it. Cos, what's the point of clearing old content?