7/7 Light Armor, Resto/Destro Staves Nightblades. They're all over the place, but based on a lot of commentary many players are simply using this setup as it is the most valid option. Are you playing this build as its your best option, or were you going for the Shadowpriest with stealth playstyle from the beginning?
Personally, I was gearing for something very similar, 5 light/2 heavy with Resto + Sword'n'board- more of a Shadowcleric. Turned out that the lack of range (for proccing siphoning/leeching strikes) and losing out on the Mana regen from Resto Staff simply made dual-resto the most valid option and far superior to the defenses you gained from the shield. That and avoiding damage (relatively easy with Cloak/Cripple/Fear) turned out to be far more suitable than soaking it.
How did your original plans differ from what you ended up playing?
Main: Breton Nightblade "Shadow Cleric" (Sustained Damage/offhealer) 5L/2H - Resto + S&B
Alt: Argonian Dragonknight (Stam DoTs/Tank) 5H/2M - S&B + Bow
Alt: Nord Templar Berserker (Rawr) 5M/2H - Dual Wield + Two Hander
Alt: Altmer Sorceror (Pewpew) 7L - Destro + Resto