As of the 6.0 release, dots no longer require snapshotting. AffDots has been updated to tell you when your DoT update will benefit from Pandemic. Download OmniCC addon to have a numeric display of time left on dot icons.
Discussion: http://www.mmo-champion.com/threads/1223349-AffDots-addon-to-keep-track-of-dot-power
Type '/affdots' for options.
Dot background colors (customizable in options):
* Green: refreshing your DoT will get the full benefit of pandemic.
* Red: refreshing your DoT will not have any benefit to you.
Most common scenarios:
* Green: Casting is most likely a good idea.
* Blue: Casting is most likely a good idea.
* Red: Do not cast.