Just a thought for those thinking the cyprianists have grace. To have grace they should belong to the church. Do they?
Historically cyprianists chirotonies emerged in 1979 when a group of bishops seceded from the Auxentian synod making bishops, among them Cyprian of Filii without the synod's approval. Such an act is clearly a creation of a parasynagogue and as stated by Saint Basil in his canon 1, parasynagogs, just like heretics, and schimatics are graceless. So the cyprianists are graceless for this simple reason.
Moreover, they add the teaching according to which grace subsists among heretic until they've been condemned by an ecumenical council. This is a heresy because it declares that the Church may be split or that a baptism can be true in 2 churches holding different views, while the Creed explicitely says : I confess only one baptism, i.e the baptism of a church holding the orthodox faith.