Is there a way to know which bosess you've already killed in flex ?
As there is no instance lockout, you don't see flex difficulty in the raid lockout tab.
I did not find any info on the blizzard forums, nor an addon on curse.
go to the flex tab. Hover mouse over the exclamation mark that indicates you already killed bosses. The names of the bosses you CANT loot anymore will appear
Get an addon called Savedinstances, tracks all your boss kills for every raid difficulty/instance/scenario for the week on all your characters plus a bunch of other things like vp caps/instance limits/daily quests/weekly quests.
It's clean, easy to use and extremely useful.
Thank you both, exactly what i was looking for