[SirAlvarex]

I've been having luck leveling from 17-19 by using charm on blue mobs. Charm usually sticks the full duration, and when it doesn't it is a quick run to zone. Just charm an animal, sick it against another rooted animal. Whichever one wins the battle will be your next charmed pet. If you choose wisely, the winning animal will be at 20% health. That is usually enough for a single nuke to send the animal fleeing.

With any luck, every two kills will only use 70 mana for a charm, 35 for a root, and 70 for a nuke on the weakened pet. And you'll be medding through most of that, so you'll only have issues when you get an unlucky charm.

It only works against light blues -> low con dark blues. Any other level will break charm way too fast. I've done it successfully with Kodiaks in WC at 18, and am doing it now at 19 with Gorge Hounds / Griffawns in NK and EK. We'll see how long this strategy actually works.