Area of Effect: Display Markers

[Valmonte]

At no point does the aoe circle say when to cast. It does not tell you when to do anything.

EXACTLY like hp mp and cooldown timers (being visible timers I mean). You may not like aoe circles but saying their spoon feeding you information opens your argument up for ridicule - as under similar situations is also many other pieces of information.

It tells you when to cast that AoE when the unwanted mobs are out of the circle.