Path of the Dragon themed build.
Other notes:
This build revolves all around dragons, if you want you can use the dragon crest shield.
Alternatively if you're willing to grind you can invest all intelligence stats into faith instead and use darkmoon blade with the darkmoon talisman instead of crystal magic weapon.
The obsidian greatsword is used as its one of the only dragon weapons that can be buffed and augumented.