This is not a bad spec if you are not geared out the ying yang. The deeper ret talents for the extra crit can improve your heals per second until you get more geared.
Use the following glyphs:
Glyph of Seal of Wisdom
Glyph of Holy Light
Glyph of Divinity
Glyph of the Wise
Glyph of Lay on Hands
+ Whatever Minor Glyph you like, maybe a buff one?