shouldnt be hard to time at all. wether or not you 2 chest it or 3 chest it basically comes down to the tank route / pulling and the overall dps in the group.
but imho you will have no problem with your ilvl for a 2. i started doing them on my ele yesterday and just hit 80 sunday but hes 649 ilvl and its been a breeze lol. good luck and if u see an ele sham 649 ilvl in your queue invite me! 