Defense rating lowers crit heal %

[Concillian]

This bug makes me wonder about how +defence affects damage spells on the tank.  My impression had always been that +defence only affected physical attacks and that +resistance were what affected magic attacks.  However, if +defence reduces the rate of healing crits, then it stands to reason that it affects magic attack crit rates as well.
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This makes some sense as you tend to get signficantly more crits against lower level mobs whether you are attacking melee as a rogue would or with magic as a mage would. To scale this at a similar rate it would make sense (for programming simplicity) to tie this to one skill (defense). The PvP and healing aspects of this might be an unintentional side-effect. Of course they could just as easily be 'working as intended'.

It is a good catch though. An obscure issue, but important and interesting.