For starters, here is a visual aid for the map that Skolas is on, and how to go about running around.
And this is the health levels of Skolas when he activates his debuffs, and mines, ect.
Every like 10% is adds/mobs, so its important to call out when you start seeing them on radar for your team to be ready to start moving.
This should really be stickied in the OP. Thanks, Gutz.