You definitly dont need Blood Magic!
The Putinus Prime Guide has some useful tips aswell.
There are no doubt many different variations of the OP's build. But this one is for beginners of this game. It is good because it allows you to play the game without micromanaging a lot of things like mana, accuracy, and even resistances early on.
Later on players see the importance for resistances and the need of having them capped they will in time get the gear so they can spec out of those resistance nods. Also his guide doesn't cover using almost all of the points the game gives us. Because very few players will reach those higher levels. Doubt me just check the Bloodlines and Torment league and you will see what I mean. Very few players reach the high nineties in the non ladder leagues like the permanent league standard or the hardcore non ladder.
Also his guide is newbie friendly because he explains everything in his guide. That guide you talked about only gives a little explanation compared to this guide.
It is not about having the highest dps that is possible in the game. It is not about having a build that can steamroll every piece of content in the game. It is just a guide that helps new players learn the ropes of this game and maybe even learn the ropes of marauders if they are just new to the class.
Over the hundreds of pages of this guide I have seen how other players have made changes to the build to make it their own. Optimizing for what they want it to accomplish.