Hey there ^.^
What i look for in a build is a strong solo-aoe dmg one.
1. Champions and rares has high drop chance for unique items, and they are usually in big cave dungeons with loads of horde packs.
Fast aoe = clear faster.
2. Solo = you get all loot, and doesn't have to argue with friends or fight for it.
3. Even if you went with friends, if you both has strong aoe = clear faster.
This is not for pvp at all, since im a pve player ^.^
That's exactly what I do. I love dot classes so WD ticked all the boxes for me. As an added bonus, if I encounter anything really tough I'm well set up for kiting and the plague spreading design of the WD aoes means they should do respectable single target damage as well.
Has loads of room for rune customization, more damage, going mana neutral, health leech, pet tanks, you name it.