5 Pallys in PVE would be pretty awesome.

I’m not going to knock 5 pallys in PVP because it’s never been done; it’s nice to see someone thinking outside the box, no pun intended.

Right now to deal with fear I see a few options.
Al l Bubble
Grind for the trinket asap

If you’re not far along with your team just replacing 1 pally for a shaman would be nice.

I’m not sure of the build of your pallys and the range of shock or whatever. But often when I face something that AOE and/or fears I spread then out to avoid it.. That way they can’t fear them all, you can cleanse the rest off, or in my case dispel.

Hope that’s helpful.