While galvantula is good, I don't think it fits on this team. Hail from Ninetales-A breaks the focus sash, which pretty much makes it useless, since its primary role is to set up sticky web. Even with aurora veil, galvantula isn't the most bulky pokemon. I'd suggest swapping it out for sturdy forretress holding leftovers. Forrestress learns rapid spin, sticky web, stealth rock spikes, toxic spikes, and explosion. Coupled with great physical bulk and decent special bulk, forrestress can take the place of both galvantula and ferrothorn. With the extra space, you can add in a pokemon to help with your fire weakness, like thick fat mamoswine or kingdra.