Was Vampiric Embrace removed? IF not this could be seen as very strong raid healing (25k deals 15k damage back when she's healed for 4k of it instantly, and also heals a 25 man raid for 750 each, making it ~19k in total)
If it's removed then.... I think they should honestly just remove this glyph all together. With the new queueing, 2 high-end crits and you could global yourself based on RNG.