Quick gear question

[Dormie]

I can't seem to find an answer in game and I'm not sure what to do.

Should I use http://www.wowhead.com/item=105796/r...shoulderplates (559 shoulders) over http://us.battle.net/wow/en/item/99036(528 tier shoulders) even if I lose the 4 piece bonus?

Here's my armory.. http://us.battle.net/wow/en/characte...Ponders/simple

[Valech]

I cannot open your armory link. But I may give some hints without.
Generally, the 4p bonus is by far not as useful as the 2p bonus. If I recall correctly BiS even ditches the 4p bonus for better itemization. Since thus the argument of a lost setbonus is dismissed, it all comes down to your other gearing. if you want a real answer, backed up by numbers, you will have to sim your char and see how stats are weight for you.

[Trubo]

I'd keep 4 set as those Ordos shoulders suck.

Edit: Oh, you have LFR shoulders. Even Ordos shoulders should be better.