I am playing a mage (Kazmeir if you are hanging around KC!). I was extremely frustrated with the lack of root so I gave him Sakuragi's root nets. It makes a big difference.
I am pretty sure an epic mage with a full bag of root nets could solo a lot of the stuff on this list (you can split most camps by just rooting everything but your target, then running around the corner and cohing yourself). Sadly I don't think Kaz will ever get his epic to find out
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Also you can check out Liia/Arae's sheet: that's an epic mage/donal's cleric that have duoed pretty much everything.