Ask your DM today if you can get the variant Divine version of Anima Mage. It's not that big of a stretch, and it nets you some awesome stuff for a feat and a 1 level dip. You can bind Dantalion to fuel your Knowledge Devotion and your Dark Knowledge, you get free metamagic 3/day and free still, silent, quicken once per day, you get bonuses to stuff, it's basically a win-win. It might even be worth it to go for all three of binder, cloistered cleric, and archivist. That's an awful lot of metamagic. Not to mention the cool shit like 11th level binding for awesome free magic armor complete with Damage Reduction and teleportation, the ability to tumble in said armor, the super awesome ability to diplomance your way out of anything, and, I believe, you can bind a 6th level vestige at this level with improved binding, meaning chupoclops for charging shenanigans. You can also get tenebrous combined with that feat that heals all within 30 feet for free out of combat healing all day. The possibilities are nigh infinite.
The benefit of Anima Mage is that you get 3/day metamagic on any metamagic you have. The drawback is there's no way to increase the # of times per day you can do this. DMM, however, is much harder to optimize, especially without nightstick stacking (or at all), and you require a feat for each metamagic you want to apply it to.