Yoshi-P: "If you want more engaging content, go play Ultimate"

[Kolsykol]

there are quite a few mechanics in this raid tier that require both tanks to be alive for, off the top of my head there are tank tethers that have to be taken, and in p4s p2 there is bloodstake which targets 1st and 2nd aggro, and if a tank isn't one of them you will die like a dog

In P3S the adds also attack the second in aggro.
I've died so many times before because the Tank died and then either I just get nuked by them before they're ressed or the Tank doesn't provoke back.