With Legendary Siren, Flicker becomes +60% elemental effect chance... Along with my badass bonuses, that would be almost double elemental effect chance. I think it's alright, and like most users already said, most of the other skills are useless. If you're going to go for Ruin and you want to actually use elemental weapons, Flicker isn't a horrible choice.
XBL GT: ShAd0wF1AmE (that's a zero in ShAd0w, not an O)