It is build around using all the basic pets, dogs and gargantuan. As damage I used "Locust Swarm" since it's an amazing spell and realy fun to use, it spreads so fast.. And while the swarm is spreading I use "Fire Bats - Cloud of bats" to kill big packs of monsters. I found this build quite effictive for farming the medium mp difficulties. Ofc It all depends on gear. I ran with around 150k dmg unbuffed, 45k hp, 600AR, and 5%LS. So I was able to handle mp5 easy with just standing in the pack channeling fire bats. Exception for some pack with loads of things on the ground.
I found that I used rain of toads almoust never, so I guess that is changable for spirit walk, if you change around the spell a bit. It could help get out of some situations when you are stuck like I found myself occasionally.
Hope this build can give inspiration to someone else and would apriciate any feedback, or anything that you think can be changed for an even more fun build