Eldritch Heritage can give it to you. Also if you have a staff I think your "features" might apply to spells you use from the staff.
But what is your curse? I remember looking at this idea before, and I think I was going to take Blackened and train away duplicated spells.
You probably want to take Elemental Spell as well, because fire is a common resistance.
With Cinder Step I'm not sure you need Feather Step Slippers.
Also your AC is probably not something to write home about. Might want to consider a Ring of Protection and some armor. Even if you are not a front line kind of character, you might get attacked.
You also probably don't need all three of Chain of Perdition, Spiritual Weapon, and Spiritual Ally.
And well, when you need Cure Disease/Neutralize Poison it is awful when you don't have them.
Also Murderous Command is a will save. Unless you are some kind of specialist, or frequently deal with mooks, a first level spell like that isn't going to work much unless you are specialized in that kind of thing.