Harmony is the rune word 'TirIthSolKo' for missile weapons in Diablo II: Lord of Destruction. Aside from good damage (considering the common runes required to create it), Harmony offers the use of a Valkyrie and Revives to any character, allowing them to fight with a small army (in harmony, as it may be said), instead of just themselves and their mercenaries. It also offers faster running through Vigor, and some elemental damage to get around physical immunes as a side bonus.