Considering they some of the current best gear in the game theres no easy way to them except over time effort unless your clearing 10 and 25m ICC every week. Anyways basically it comes down to 39 a week if you do the basic minimum of what MOST level 80's should be doing and 49 if you're where i'm at.
2 per day every day = 14 a week 5 from weekly raid = 5 a week 2 from 10m voa and 25m voa = 4 a week 2 from bosses in icc 10 (just for first wing) = 8 2 from bosses in icc 25 ( just for first wing) = 8
thats 39 for doing the basic minimum per week i'm currently at 49 per week with all of this + fester + rot 25m and plauge halls in 10m. OFC if you're clearning all that + lich king in 10 and 25m you're seeing around 81 a week or so.