WowAce

An  enhancement to the range markers, the possibility of having it change color based on how many raid members are within that radius.

Example: The Rotting Frost Giant (mini weekly boss in ICC) uses Death Plague "Infects an enemy with a malevolent plague that will kill its host if unable to spread. After 15 sec, the Plague will infect all players within 8 yards"

Strategy: Ask everyone to make piles of 3 or 4 people to share and reshare Death Plague. This allows everyone to share plague avoiding instant death, but keeps raid damage ticks to a limited number of people at once.

HudMap Solution: Create a Range Marker, 8 yards radius, color white normaly, red when too many are nearby, set 'too many' to 5 people.