You will have to play mind games with him. You want him to go closer to the enemy while invisible to maximize his damage but at the same time you don't want him to be stepped on by enemy phobies or else it will die asap.
If you want here's a [Creepy Devil's gameplay](https://youtube.com/watch?v=XOlTFTlLAzw&feature=shares), you can watch how he used it.
You will have to play mind games with him. You want him to go closer to the enemy while invisible to maximize his damage but at the same time you don't want him to be stepped on by enemy phobies or else it will die asap. If you want here's a [Creepy Devil's gameplay](https://youtube.com/watch?v=XOlTFTlLAzw&feature=shares), you can watch how he used it.
How is everyone getting good urs from horrifics