There's a fishy bit of the retcon for me, which you might help with. Union Jack blew up Prospit when he was created. However he was never made post-retcon (Gamzee was not able to sendificate Cal, yes?). I can understand Union Jack's remaining by being outside the furthest ring, but I cannot understand why Prospit still has a hole in it.

Vriska acts kinda suspicious here when talking about where Lord Jack came from so I think she sent Lil Cal to him and is doing her whole “I created the bad guy but will also help defeat him so it’s ok”