Why bosses are that hard? Ursoc is unkillable in pug. Nythendra too.
Get better or die trying. (How can you know Ursoc is unkillable if Nythendra is unkillable?)
It's week one. If heroic is pugable, the instance is too easy.
Bruns/Sendaii/Sofex/Sofe
This is in fact the easiest tuned heroic raid I can remember at least since Dragon Soul, maybe ever :P Archimonde / BH / Margok were much harder than Xavius for example. Pugs just aren't very good for progressing