Is it normal for them to be so rare, that I'd have better luck getting Ashes of Al'Ar to drop?
Today I went through SoO wing 2, and not a single boss dropped one. Same for wing 1, save for Sha of Pride who I know is a 100% drop. This got me to 4/12, and I'm not too confident that ToT Wing 3 and 4 (save for Lei Shen) will give the remaining six I can get for this week.
I know the cloak will be obsolete by the mid 90s when WoD comes out, but for now I still feel like it may be worth pursuing. I'm not just keen on the grind, what with the Sigils, Valor Points, and Secrets that came before the Runestones.
I have a 535 Timeless cloak currently equipped, so I guess that will have to suffice for yet another week.