Masterwork Polaris Lance+Way of a Thousand Cuts=infinite melee & orbs galore. I feel like I could solo any activity with this thing. I just played the Broken Courier mission and I never lost Playing With Fire for more than a couple seconds and had my super halfway through each encounter.
This is how exotics should be. Not super overpowered on their own, but they work together with other things to become amazing.