I have a thought on how to build the buffs corner on the HUD.
What if the top most slot(s) are set to be encounter specific (raid, dungeon, etc). There wouldn't be anything overlapping anything because there would be a place for it. Below those would just be symbols. Each possible buff would have a specific symbol set to it (just like we have but also for exotic armors). That way we would be able to see all our active buffs at once.
Ex.
Golgoroths Gaze 0:12
🌟🩸🧠🔥
🎶✨🌚💨