Even that doesn't seem strong enough.
The biggest problem is that enemies have too many ways to spread curse, and they can spread it virtually for free. Enemies can spread curse when they bleed, they can cast curse with Void Glide, they can straight-up cast it, and I'm probably missing a couple.
The source point cost of Bless just makes Bless not worthwhile. That has to be removed for Bless to actually be useful.
