love blood walk too.

I also love the fact that scarification gives you 6 scrolls to play with and blood draught lets you store as many as "blood magus + con score" potions in your blood. so the -2 to you caster level doesn't really hurt you so much and you can get that back easily enough.

was just rereading the blood magus and it seems that you can trade off damage equal to your level to your homunculus and yes it can craft for you if you give it the skills.

I think another class this would go well with is the warmage.