Guild Wars 2

http://www.gw2builds.org/create/bwe_1/elementalist#2.0-3.2.9.15.3-30.30.0.0.10-7.11.12.4.3.1.2

Is this a viable build for leveling?

Yes, very. Scepter/Dagger is the most versatile with the most CCs (two blinds, two knockdowns), the best earth defensive move, two water heals (one with a condition remover) and the best fire burst damage. I’d get rid of the lesser elemental, though, and use arcane shield instead. Three blocks is an amazingly good defensive cooldown for when you pull extra mobs. I also go 10 water to reduce the cooldowns of my water heals, though I may switch to earth or arcane at some point to try them out.