To be honest Cora’s definition of help is very skewed and warped. To her she comes across like the mom in Serial Mom, and Dell from Tideland. In that she will kill anyone who gets in the way of her plan and ideals (even Regina herself) and if Regina must be gotten rid of then Cora may preserve her the way Dell did (she did a taxidermy of her mother and the girl’s father)–maybe not taxidermy but much in the same vein where Regina is preserved and possibly more easy to manipulate.