I don't know all of the mods in the pack, and now I'm confused. Can somebody help me how to start with blood magic? It seems it is needed for other mods like Botania, but I don't have any idea how to sacrifice blood to the altar. There is no Sacrificial Knife (I think the knife named Death could be that, but to make it Botania is required).
It's not only death for your lives, it's death for your computer as well (in my case .__.)
I can't seem to have stable 30 FPS no matter what I do or how much RAM I allocate to java. In other words, too much mods, but don't worry isn't not your fault OP.
Either way, the modpack itself is really hard. The moment you spawn, you'll be attacked by the animals right away, the only way to get wood without being attacked is to climb onto the tree and punch the logs through the leaves.