Bone magic/Blood magic witch build

Hello, first post on the forum. I've been searching for a blood mage witch build with a focus on using the bone magic school of spells. I've seen a few around such as this one (https://www.pathofexile.com/forum/view-thread/3592603) and was wondering how they perform in endgame, and how they are to level?

And if this style of witch isn't any good, are there any non minion builds anyone could point me towards?

Sorry if this isn't really the right place to be asking all this