Whether or not PIE helps with LNC debuffs, a +2 modifier is negligible under the current stat system.

Post 1.18, accuracy isn't as big of an issue as it has been. At this point, I think the only thing that really matters is the raw attack value of the weapon. Thus, the Champion's Lance +1 is the best IMO. Even the NQ version is probably better than anything else.

I'm sure all of this will change at 1.19, though.