First I would like to say as a paladin healer the former libram is my personal preference as it is as well by many others. A link to said libram on wowhead: http://www.wowhead.com/?item=40705
This libram is superior as it helps make Holy Light which has become the primary heal more efficient.
To Quote Frmorisson in the comments on that page "This is not a good libram, since HL tends to overheal a lot anyway. Use the mana reduction off HL instead of you use a lot of HL." Every single argument there is valid, the only fights where it can be considered superior is Loathab. Add that into the four piece set bonus of tier 7 and Wisdom Seal glyph and Tolerance just doesn't stand a chance compared to Renewal.
And with the Illumination returns from a crit heal coming BEFORE reductions I would like to recommend putting the rating on Renewal compared to Tolerance at least equal if not rated higher. Hopefully someone will agree, but if there is trouble understanding why I am suggesting this I would be happy to give a more in depth view
.... (PS: sorry if my grammar and spelling makes you want to tear your eyes out... least it isn't caps lock?)
