Oh man that's kind of hilarious, Tifone! 8 )
If only Fomoria had access to Fire magic, natively. In most cases though the Thunder Bow will be best option, and it can be pretty sick in the hands of a Fomorian King, especially with Quickness on him.
And if you're going for pure carnage factor, don't forget the Spirit Helm!
(Bottle of Living Water, and Bag of Winds optional.)