Halberd upgrade ?

Im in a ng + . I going to upgrade Halberd to either normal 15+ or should I do lighting ?

i have 1 Titantie slab Here Is my build ..

http://mugenmonkey.com/darksouls/?c=1603461218799709

Thanks

If you like it and use it, +15.

Edit: Have a look at this this and you will understand why. (also Elemental weapons got nerfed with the 1.06 patch)

+15 all the way.

On PvE some enemies are surprisingly resilient to lightning, so I'd say +15, a buff will do wonders.

+15 hands down, throw on the Leo ring and the Halberd will destroy your enemies. It can hit for as much as 600 damage in PvP if you get a counter attack with the Leo Ring. (2h)