Situation:
Anyone spending time in Legendary Ravenloft has experienced being absolutely decimated by spells:
* DoT spells such as Niac's Biting Cold, Eladar's Electric Surge, Black Dragon Bolt, and Burning Blood.
* AE spells that are ignoring saving throws for half damage, such as Cyclonic Blast.
* AE spells that are not mitigated by MRR, such as Horrid Wilting.
Background:
The primary mitigation mechanic to reduce spell damage in DDO is Magical Resistance Rating. When the MRR cap was first introduced, it wasn't even possible to reach the arbitrary artificial cap for cloth wearers (Sorcerer, Wizard, Monk) because of the lack of itemization, past life feats and enhancement changes. Now it's commonplace for cloth armor wearers to hit the cap by equipping one item. While not as epidemic, light armor wearers (Rogue, Ranger, Artificer, Bard, Warlock) can hit the 100 MRR cap.
Reference:
http://ddowiki.com/page/Magical_Resistance_Rating
http://ddowiki.com/page/Physical_Resistance_Rating
Assessment:
The problem with MRR is the arbitrary artificial cap based on armor type. Cloth armor wearers are all too keenly aware of this. MRR cap is easily met by equipping just one legendary item. There's no point in considering an Insightful, Quality, Mythic or Artifact item bonus, or enhancements that increase MRR. This does not align with DDO's core principle of character customization.
No MRR benefit from Deep Gnome or Warlock past lives can be realized at level cap for cloth wearers, unless the Beacon of Magic set is worn. Unfortunately due to the typing of the DC bonus (Artifact), it doesn't stack with Slave Lords Sorcery set which is superior. Six past lives is a huge investment not to reap the rewards from. DDO thrives because of the TReadmill. Don't give players another reason to not TR. There are enough of those already.
Recommendations:
1. Remove artificial MRR caps based on worn armor type. PRR doesn't have an artificial cap based on armor worn, and no one is complaining about characters running around with too much PRR in cloth armor.