Greater emeber of fyr'alatah

fine asking again looked up at wowhead apperntly geting 13 emebers and then killing heroic fyrakk its 100% for the legendary drop but this only counts for the heroic version of the ember correct? meaning lfr/normal verison are either usless or …maybe give way less chance for the heroic drop chance? anyone got some confirmation on how this work cause i kinda want my legendary BEFORE THE NEXT EXPANSION you know when its currently atucall part of the your gear and not complety redundant