So in 6.3 alliance raid we have Nophica, Althyk + Nymeia, Halone and Menphina as the last boss most likely. While this mostly follows the pattern most have already figured out, the addition of Nymeia, which most would've guessed would've been introduced in 6.5, leaves one unknown spot open for the last tier, as alliance raids tend to have four bosses.

For 6.5 alliance raid we now have Thaliak, Llymlaen and Oschon, with a mystery fourth. Any wild guesses as what the fourth might be?