Please do not listen to the rubbish about speccing PIE instead of MND. Mind is at least 4 (some say 5) times more valuable than any of the secondary stats, and if you're really having mana issues (which you shouldn't be) then you can eat Mulled Tea for a healthy boost of +14 PIE (HQ). There is no such equivalent for Mind, remember. You are unnecessarily gimping yourself for "only 50 less heals huehue."

Heal smarter, not spammier. ~50 less HPs on your Physick means that you're casting ten Physicks to my nine Physicks to restore the same amount of HP. Not only is that net loss of 133 MP, it's also a wasted global that could be better off used elsewhere. I'm not even including the gimpier Fairy heals, either - PIE won't affect her, whereas MND will, so your HP/s is even lower.

And finally, you're losing +30 INT when you swap to Cleric Stance to DPS, by not speccing into MND. That's a significant drop, and yes it does matter in end-game content.