Tons of videos of kills of the Wing 4 bosses have been posted to YouTube in the past few days. I've dcided to watch them all and post the ones I think are best. This is no doubt a fools errand, but it sounds like a fun challenge. I'll up date this as I go along.
Here we go:

Cairn the Indomitable 

Absolute insanity: Druid solo and it only took him a little over 4 hours: 

Mursaat Overseer
Very simple tanking strategy (did this bug somehow?)  (Brazil) https://youtu.be/nZ7PLR7xgKQ

Samarog 
Shield strategy. Two adds one jotun and one human spawn. The idea is to keep them apart with the human under the shield while you focus the jotun. (Anaconda Ren) https://youtu.be/COflnr5dtbo

Deimos
First kill from qt (fennec, Mesmer pov) https://youtu.be/aSer6fu_nz8
Druid flak kiting from KING https://youtu.be/HuE6_rVq1hE