The optimal choice is 40%ED, 15 Max Damage Ruby of Carnage jewel. If you really need the speed on the weapon, then you socket a 40%ED, 15% IAS Ruby of Fervor.

Shael, Ohm are considered as bad socket and cannot be traded for a high value.

To me, the WF's Knock Back is enough for taking any monster.

A more common rune to be socketed is Sur. Hit Blind Target can be useful at times.