[Perdition]

For Haunted Soul, an idea came to me was that it self inflicts an uncleansable confusion on you at battle start, however all your attacks with the weapon inflict fear as they do with current Haunted Soul. In addition, your attacks against feared targets would deal 20% (or some other value) of the damage as bonus dark magic damage. However, your attacks against allies due to confusion also deal that same amount of bonus dark magic damage.

The cursed version of Haunted would be the same thing except the fear is inflict based, and the bonus damage is 10% (or some lesser value)

The idea is that because you are possessed, the possessing spirit doesn't distinguish your friends from foes. The spirit manifests when you strike someone that fears you, striking in tandem with you. Because of the confusion though, it also manifests if you end up attacking your allies (even if not feared). This way it keeps its current identity as a way to apply fear from attacking, but it also gives it a boost to be comparable to the new curses.


As far as the drawbacks of parasitic, I think only allowing leeching effects is still a hefty drawback as you are unable to heal or regenerate FP at all otherwise. If you think about it, there are only so many leeching effects in the game, and they are not large enough to offset eating 10-20% of your FP/HP per attack. Vampirism caps at 24%. So if you deal 100 damage, you'd heal 24 health from that attack. If you have 1000 HP though, you'd be losing 100 HP.

FP leeching effects are even more specific, and although they can have bigger returns of FP compared to the returns for HP you get from HP leeching, it's still something you have to specifically go out of your way for. I think not allowing any means to manage your HP and FP would make the risk outweigh the reward too much.