This addon is generally tailored to how we, Void@Razorfen, mark the Channelers of Magtheridon.

The addon replaces a spreadsheet where the interrupters were manually planned before or during each raid.

Definite melees are places as far front as possible (Warriors, Rogues, Druids/Pallys with MT mark)

Maybe melees are placed next (Druids/Pallys without MT mark, Shamans)

Definite ranges are placed next (all others)

The "Spare" group is filled up last

As a RAIDMEMBER:

You don't need to do anything, but if you have the addon installed you will get a nice overview
your own "dot" is larger and RED so you can easily see where/when you are placed

As a RAIDLEAD:

You need Assist atleast
Open the addon with /maggi
Select a Maintank, grid is filled
"Share" the grid to everyone who has the addon
"Spam" the grid as a Raidwarning with subsequent (3s delayed) readycheck and also share to everyone who has the addon

This addon is very fresh, a few additional functions (e.g. active warning when it is "your" time to move to the cube) are planned, if you have suggestions, don't hesitate to comment below

Magtheridon Planner