[WoW] Boosting with Holy Nova

I've recently just started multi boxing and im using a l70 priest with alot of +dmg gear (+1000) and i can boost successfully in Deadmine and Stockades, but i was wondering if anyone has had any success boosting SM with holy nova or if im better off just straight leveling / questing once im done in Stockades?

Boosting is worthwhile until about L38-40. I don't know how fast a Holy Nova build would work compared to a mage/AoE melee, but if you can clear cath in 10-15 min, it's probably worthwhole.