For a BRD's point of view.
Yeah I know because I am BRD and well geared for WP SR of course I would want to do the PLD, WHM, BLM & BRD setup simply because it is the most effective safest way if everyone in PT know what to do.
BRD pros is of course high DPS and AoE, BRD can cast mages ballad between the fights, BRD can cast foe requiem for a +10% elementary resistance when fighting mobs, BRD can swift song for faster movement.
So this setup is figured to be most effective for WP SR and no other DPS can do the same.
If you are MNK or DRG or other job just make your own PT like you want it.
I had a blast doing WP with 4x SMN burn it works great with titan tanking each own monster and we AoE bio, bio II, etc not bad with this setup it is manageable to take down WP in less than 25min.