there are many strategies, i haven't tried sunder at all. Could be that it is very efficient, could be making a new league start is the most efficient.

sharpnel shot does major work early on.

storm cloud can carry you to like lvl 50 with split arrow, with ease, and added lightning on a 4l, or further if you need it to, tempest is a huge boon and can be taken into endgame if need be. Items like Wake of Destruction boots, prismweave will last to maps. Impurity of lightning for bosses should make things quite a breeze.

SSF you can just find a bow with decent enough attack speed and crit, scaling flat ele from Hot/wrath/added lightning, might not be the fastest but you dont have to worry about playing with gems i won't be using in the end, or worrying about attribute requirements early on.

Bow or wand...the new power siphon looks very juicy in a similar setup, less touchy than KB.

My GH build should be easy to level and progress with, theres some uniques that are really cheap, even day 1. I don't really have a plan besides sunder-> glacial hammer when i get thresholds, i did make tree adjustments for using ele hit in the very endgame to keep my options open, we'll see how it pans out :P