You got lucky to at least see him, it took me 3 attempt to get a glimps of svaara =P

tanks for contributing with video

this need to be adressed

One thing i noticed meanwhile

If i cast blizzard 2 near where companions are battling the umbral ice get refreshed even if i don't see the dragon and i get the reward. So if you don't see the boss, spam nontarget AOE in the position and you should at least get contribute bonus