It's not terrible, just incredibly mediocre, while the rest of the entire game and story is top tier.

Yeah, intensity definitely would play a huge part in it. Let's say you weren't about to die, but you had pretty bad organ damage(like constant smoker or something), that'd also play a part in the cost, vs let's say just someone who did it just in case and only sprained their ankle or broke a bone.

If it was time based, though, none of that matters, mostly besides death, since there's an agreed upon time limit to a certain amount of regen, so like a few days could just be offerings, like artefacts, blood or money, while in the moment/long periods of time would be years or another life/soul.

Depends on length and how grievous a wound may be, for a very long time, servitude, or sacrificial offerings would be necessary(soul, murder, extremely large amounts of magic). For limbs/avoiding death, you'd have to sacrifice another or spend years and years of your life in servitude,

If you guys reply to this post with your wants, I'll try to come up with what you'd have to do for the pact, at least for Dramos.

Like he wouldn't even change much, just be a tiny bit bigger and maybe able to split off into 3 for a bit, but he'd just be super bloody and able to splash into puddles and disappear.