Hill Giants are normally used for Nothing. The fastest way to get to them is by using the "Games Necklace".
Games Necklace > Dungeon Teleport 1(D) > Taverly Dungeon.
Run past the skeletons > Ghosts > Black Knights > Magic Axes > When you make it to the Chaos Dwarfs run south and the Hill Giants should be right there.
100% Drops:
Big Bones
Gold Charm