Originally Posted by
nwo
The tier 8 set bonuses are amazing IMO and definitely better than the (4 set) t7 bonus. So, to answer your question, replace them when you get some t8 or when you find gear with better stats. A lot of t7 is loaded with haste, which is not really that beneficial to ret pallies, the 2 set bonus is a keeper, but the 4 set bonus is not really as great as it used to be, and it is definitely not worth keeping the 4 set bonus along with all the haste that comes with the t7 gear.