Frenzy does work during WoE, if that's what you're asking.
Dispelling Frenzy: Works, but after dispelling LK has full HP, so he's in no way neutralized, and if he has SP he can simply cast it again.
Slowing down(Slow Grace, Quagmire, Decrease AGI): Works, but Frenzy gives speed boost, so it's not as effective.
Full stop(Ankle Snare/Fiber Lock): Probably best option, only drawback is that traps will trigger on anybody, not just enemies.
Counter-attacks(Root/Reflect): All fine and good... considering the LK will bother with attacking you, which is unlikely. Frenzy is Emp breaker first and foremost.
Divest: FCP. Who even uses divest anymore?
Aspersio: Not with Evil Druid armor, you aren't...