I have updated my previous post on the Regeneration Tier, to include the latest changes in the beta build (15913). These numbers reflect the buffs to Mindbender and Nerf to PW: Solace.  I also have included a new chart, inspired by similar analysis that Malevica did from Type H For Heals. This does change the overall analysis and balances the tier substantially; however PW: Solace still has the greatest potential for regen. Please check that post out here:

Mists of Pandaria – Priest Regen Talent Choices