Galvantula is pretty awesome. Life Orb thunder wrecks lots of stuff - the 30% paralysis is wonderful and can really support the team well.
Personally, I go for HP Water instead of Ice or Grass as the final move. With the exception of Magnemite/Magneton, and Rotom (normal form), all Pokemon that resist Bug/Electric are weak to water. Whereas some things that resist Bug/Electric are neutral to or resist ice (Steeliz, Dory, Rotom-H). The only problem with HP Water is that you miss the KO on stuff like Gliscor.
Look forward to using this thing in a lower tier, that's for sure.