This works wonders for speed farming mp0-2.
GI, GF, SV for passives. This reduces cooldown very fast. Bear and acid rain is mana intensive so being able to spam spirit walk honored guest on a 12 sec cooldown fixes this as well as killing fast and picking up globes with the thing of the deep. I use SW and Horrify to move fast all the time. Hex makes elite chickens melt.
My norm is to SW into a large pack, pop SH, then acid rain. This kills most packs. Bears cleans up anything left over. I always use toad off hand and keep moving to pick up globes fast.
Reflect mobs I dps when SW is up and always target the chicken first. Having about 9k life added per globe/pot and managing your globes/pot for reflect is key. All other affixes are quick kills.
With this build I am farming very fast, able to spam bears and acid rain as I please and the sprinting around the map makes keeping my buffs up a breeze between packs.
As you can see in my profile my gear isn't BIS but around 80k paper doll buffs up very fast.
I don't use any attack speed on my gear, inflates my paperdoll and burns mana too fast. I have a hit it once an be done mentality. Damage per mana spent is how I think about it. We don't regen our resources like other classes so getting the most out each cast has made my life very simple and makes gear choices much cheaper when you stop looking for attack speed on things. Just crit, crit damage, tons of int, % damage if you can afford it like on my tal rasha's ammy, zunni boots, and stone of jordan.
Get a stone of jordan with acid rain and you really see the crits flying and elites melt before you realize your fighting an elite in the pack. 1.5 aps seems about the sweet spot for WD for not running out of mana and being able to cast fast enough.
My next upgrades are more crit damage on the wep and more crit on the ammy with same crit damage.
Hope this helps.