Hi,
If anyone is still having trouble with turn 5, I have written up a detailed guide of the mechanics in the fight and how we (ISIS) deals with them.
www.isisfc.org
http://isisfc.org/forum/m/14432477/v...urn-5-isis-way

Our method isn't perfect but, we usually one shot twin each week. It is very detailed, so it is a bit long. Critique our strategy if you like or w/e, I hope this helps groups who are still struggling on it a bit
We do a method at the start I haven't seen any other groups do, which I feel makes the hard enrage trivial! (Not sure if anyone else does this too?)

Subscribe to our youtube and check out our videos, we will be adding our solo heal 1-4 and twin kill (2 healers) run of coil this week, shortly.
http://www.youtube.com/user/ISISraid?feature=watch
We stream our coil runs for the community. We are a small FC on Coeurl, drop by and theory craft, read our strats, or add to them!