What to say about the new boss in VoA, Koralon the Flame Watcher?
Don't stand in fire and heal like crazy when he throws fire on raid. That's about it. But I repeat: don't stand in fire on the ground. To add that extra dimension of trickiness to that one the floor itself is sort of glowing in the middle (think HoS escort event room) so if you stand there the fire might a bit hard to see.
Don't be too slow on the dps because Koralon has a stackable buff that increases his damage by 5% every 20 seconds. If you take too long killing him the buff will have stacked so high that the tanks can't take the damage.
Oh, and one more thing: Koralon must be Ignis the furnace Master's twin brother. They look exactly the same down to the slag pot worn around the waist.