Windsong is viable if you don't get dancing steel. It has a pretty nice crit proc on it that can proc independently of the others. You can think of it as a crit proc enchant that can also give you haste and/or mastery. I'm not really sure how Ele force stacks up against WS though. From what I understand they're roughly equivalent. Either of those enchants are better than nothing so yes there is a point to using them.
<Delusions of Grandeur>
[H] Runetotem - US