You have Strong powerspikes arround mid game when you start being tanky while keeping hight amount of damages with demonic and your mythic. You have also a lot of heal.

... I don't know, I just made it as an OTP Swain and test it in training tool. You have damage but you are also verry tanky. In the same way as the standart swain build, this build is a late game build, don't try 1vs2 at 4m otherwise you won't be able to fully see this build. You can leave comments if you tested it and if you want to improve it.