Honestly - do you use your managem as soon as possible and if you do, do you always remember to recharge it to 3/10 stacks?
This addon is meant to make life easier for Arcane mages by helping them manage their managem.
It will show a Blue gem icon when you're in combat and you're missing enough mana to justify using the gem and your managem is off CD.
It will show a Red gem icon when you're out of combat, alive and your managem isn't maxed up with 3/10 charges or missing.
The addon detects whether you have Glyph of Mana Gem and adjusts automatically.
The addon is configured by editing the Broker_Managem.lua file and via your Broker display addon.
This addon requires a Broker display addon like StatBlockCore, Fortress and the likes.
To achieve the effect like on the screenshot :
In StatBlockCore : Disable text, scale to 2.0 and position the tag somewhere you don't need to click (as you can't click through it) but in a visible location.
Updated for MoP, adjusted for new mana limits and it takes Glyph of Mana Gem into account.
Now truly takes GoMG into account (Why oh why did Blizz make a completely new managem?)