Champs with multi hit spells and damage procs are broken, need developer fix

[Mentalist001]

Spellcasting champs with the poison, evil, and disease damage procs (and multi hit spells such as magic missile) are way more powerful than anything else. There is nothing you can do about the bonus damage, especially with the disease champ (no save no resist, nothing). This can't be working as intended, two people in my guild just got one-shot for 600 damage at lvl 14 by a multi hit crushing despair. Yup, even non-damaging spells with multiple hits will one shot you. Magic missiles will do 3-4 damage apiece but get 35 bonus disease damage each - okay. Can the developers confirm this is not working as intended and work on a fix? A multi hit spell should do the bonus damage on the first hit only, otherwise we have no chance other than absurd hp stacking.