This is about maximizing panteons output through macro. Panteons kit is pretty simple and how you chose to use it is less about mechanics and more about both micro and macro descision making. When should you w when should you q when should you ult? etc. I rush arc before my mythic because it maximizes my macro output. Especially when I start to lose lane. Arc and duskblade are the core items. After that you can pick whatever you like based on your prefferences, matchups, and team composition.