Hey there,
I haven’t played my warrior much in S3 and started playing it more again. I’m at 9 HC kills and 3 LFR kills for the raid and have not received a single splintered spark of awakening at all. With the catch-up mechanics in the game, I doubt that’d be just “bad luck”, because not a single splintered spark from 12 raidbosses seems…unlikely to say the least. Any info on that?