http://forum.square-enix.com/ffxi/th...891#post273891

Cure potency will be affected more significantly by healing magic skill. If a player has high healing magic skill, cure potency will be greatly increased, but low healing magic skill will have almost no effect on cure potency. The effect of skill level on cure potency will vary based on the type of cure, but cures lower than Cure V will be affected the most. Note that Curaga, Cura and Waltzes will not be affected.

Cure I-IV: Up to 1.4 times the normal cure potency
Cure V-VI: Almost no change

With this adjustment combined with the increase of cure potency mentioned earlier, we would like to increase opportunities for mages jobs other than white mage to serve as healers.
Google Trans was pretty bang on, essentially all cure spells from T1-T4 move up a Tier with combined skill and potency. A buff for all jobs with native healing skill, and exactly the thing RDM needed for healing. Here is to hoping they do something similar with Enhancing and Enfeebling.