Calthar's page

Actually, i think there is a way. Your deity must be one that have the "Repose" domain, as Pharasma. Choose it as one of the domains u want for the 2 u have for the blessings. "Repose

Gentle Rest (minor): At 1st level, you can fill a living creature with lethargy by hitting it with a melee touch attack, causing it to become staggered for 1 round. If the target is already staggered, it falls asleep for 1 round instead. An undead creature that’s touched is staggered for a number of rounds equal to your Wisdom modifier (minimum 1).

Back to the Grave (major): At 10th level, when using channel energy to heal living creatures, you can take a swift action on that same turn to also deal damage to undead creatures (as your channel energy ability). Undead take an amount of damage equal to half the amount healed, and can attempt the normal saving throw to halve this damage." As you can see, when you arrive to 10th level can use the major blessing, that let you use your channel hability to heal in area, and also damage all the undead in the area with the half of the amount of the cure using a swift action for it. They can halve this damage again with a saving throw. But, in fact, u will be healing people and hurting undeads with the same action.