As an aside, I frankly don't think it should be possible to full clear heroic modes in 2 weeks. Regardless of your skill. The gear check should be tight enough that it requires you to farm the previous tier for longer.
That'd extend the life of the expansion.
I'm going to catch flak for this, but aside from fine tuning strats, there's no preperation that goes into these raids anymore. There's no getting everyone shadow resist gear for a certain boss, or fire resist gear for this place. There's no, we need to prep for this boss by getting bane weapons, or a certain proc or buff.
It's just, here's the strat, here's the minimum number you need to pull. Execute. /