What method did you use to craft that?
I reforged "of Wizardry" (can't remember what quality tool i used) on GM crafted Magical Shortbows until i got -15 Mage Wep on one, then i PoFed it up, whetstoned off the DI, and imbued SC, 50% HLA/50% HLD/15% SSI on it. It still hasn't been enhanced (can get 25% SSI then).
And wouldn't Hit Lightning be better than HLA since you want what you are provoking to kill each other?
I usually use my Bard in tandem with another char, so my Bard's main role is to provide debuffs to the opponent, and buffs to my party. Having HLA/HLD on the Bow is yet another way to debuff the opponent. I very rarely find need to provoke two targets onto each other.
So my 4x120 Bard is able to discord the opponent, apply HLA/HLD to the opponent, have the Vollem apply Armor Pierce (+10% Damage Taken for 3 secs), while also providing either Peace Buffs or Provo buffs to my party. My Bard is able to greatly amplify the power and success of my other chars or party that way.