Originally Posted by
openair
No. Even following all the advice here. Even taking the steps outlined as "not totally needed." At the very least, two discipline priest will have fewer pw:s casts and less borrowed time uptime than if there were a single disc priest.
You can't both Pw:s the same target. If you do, you've wasted a global cooldown. Tracking weakened soul helps, but it doesn't solve both pw:s within a gcd of each other. "Just pw:s someone else for Borrowed time." You've still wasted a gcd. It still hurts your output. When a firemage gets a pyroblast proc, does he cancel the fireball he started casting while the fireball that procced pyroblast was still in the air? No, that would be a dps loss. Same reason you can't "just pw:s another target" and maintain the same hps.
Ranks are the not the only place hps matters. If you're doing anything less than heroic, sure you can make two disc priests work.