So no, it's not a problem of skill, we know what we shoud do and we do it. That said, we are not pro's and not pretending to be, but we have the minimum of skill needed to achieve victory. I'm sure it's a gear problem, because with more gear, less heals would be needed, and more big heals would land on players, and mana of the healers would last longer, without counting the dps or defense increase of the others. Therefore, LFR is mandatory (maybe not for all, but for some guilds) to gear up and not waste another 2 weeks wiping in the same damned boss. Average ilvl of my raid is 470, and that isn't enough even we do what is required.