Wr is better in pk as far as support goes because of stuns and slowing aoes. They can be good in 1v1 if you are good with timing, but if it is a sage wr it would be better to just support in mass pk.
An ea is ok in both mass and 1v1s. It is easier to play rather than wr, especially if demon ea because all you have to do is aa and auto attack. For 1v1s on demon ea though is can be a bit hard, depending on who the target is. Physical and auto attack don't go together. Channeling ea shouldn't have a problem with it though.
If you like dding over supporting in mass do ea. If you like supporting for mass then do wr.
Idk I just wrote out a very simple reply, some may go into detail more.
