4 or 5 accounts

Now that S5 is out I noticed everything has to do with arena so when your going for S5 it's better you have 4 acc with 1 healer just like the most do. So I was thinking shouldn't I better take 4 accounts then. Or will S5 be in a month or 2 grindable by honor just like in TBC?

Advise is welcome.

I decided to downgrade from 5 to 4, that way I can have another person in there with me, and of course mix the classes a bit. However, Im doing DK 4 shamans. My brothers got a 80 dk so that helped make the choice a bit easier.