Well the best I see for a weredruid would be BotD Zerk unless you can get a magic or rare weapon with enough IAS to hit 4fps AND do decent physical damage.
With the BotD zerk you'll hit 5fps which is still slower than a paladin zeal.
As for the choice of spirit, I think sage is much more useful than Heart of the wolverine because it gives so little bonus AR and Damage compare to the Sage's Life bonus.
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