Just use your Creeping Crud spell.  It's by far your most mana-efficient damage.  Don't bother to root if it's breaking too often.  Stick your snare, then the dot, then run off and med kite.  I'm trying to remember what I killed at level 26.  It might have been spiders in EK or mammoths in Everfrost or maybe gnolls in SK. 
 
I think there's a mistake in the resists on the magic line dots--they should resist about .01% or so.  Hopefully it'll be fixed soon.  Good luck! 
		
		
		
		
		
		
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