I never ran into trouble until the butcher. I got better gear and finally got him. I use dogs to keep some distance even though they die a lot. Then spam dire bats and darts while mana recharges. All my gear is focused on mana because dire bats drains it quick.

Works pretty good for me so far but Im sure I will come to a point where I need to switch it up. Level 16. I also take it slow and farm every nook and cranny so I bet that helps too.

i will have to try spiders/dogs mentioned earlier. Sounds like a good way to keep enemies at bay.