Sham Leveling Advice please

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Have you tried root/rotting? Root the mob and dot it, and sit back while it dies. Don't nuke it with a frost spell, as that is likely to break the root.

Otherwise, I don't know much about shamans in general, but at 14 white cons should be too tough for just about anyone who isn't twinked out. You want to be fighting things that were blue at like 12.