1 caster can stack divine punishment up to 3 times.
With this update, single-target applied dots cast by different casters stack (Two wizards throwing Melf's Acid Arrow at a monster each get separate dots, where as only the strongest one used to apply)
Can 2 clerics/FvS get 6 divine punishments on a target (With each one having the timer on his own spell I would imagine)?
I imagine this would apply as well to the Wizard/Sorc stacking dots.
I'd test it, but I'm the only divine caster in my very small guild.
*Gah! Thought I was in Spellcaster thread. My bad; someone with the power to do so, please move this to the Spellcaster thread*