I consider Quodron more difficult than Skolas - last night I would kill the eye, but didn't get the buff. It happened to both team mates also - THEN - Quodron decided to get off his platform & was at the back left, which was odd. After a wipe, he was on his platform for 2 of us, but the 3rd guy said he was roaming the middle on his screen - first time I had that happen... It is also awesome when you can't find the eye in time, or run out of shotgun ammo. We did finish it though.... Skolas isn't necessarily difficult, just a long fight usually.