When thinking of a redemption arc for caliborn I only picture it in one way and it involves a reference and lord English winning
After all the light has faded, god clock faded to ash and dream bubbles reduced to a fantasy for lost souls, lord English is left alone and for the first time in caliborns life he is forced to reflect on his life only to come to the conclusion that it brought only temporary satisfaction that could have never lasted
Kinda got inspiration from the lich from Fiona and cake but I feel it would be better if he would mostly play the piano to pass time since it's a instrument that needs gentle care (a equius problem and technically hal by extent), concentrated control and order (a gamzee problem since he's the chaos, wild card) and lastly patience to even learn the damn thing which we know caliborn isn't ever interested in but afterall he has a immortal life to learn so one day he just might have to
The only way i feel this would end well for this lord English is if someone with enough mercy stumbles across his void that once was a dimension and somehow separating all the parts to let them find a dimension that will allow them to live a decent life maybe even having caliborn and calliope meet again with caliborn finally winning without cheating
But idk, for all I know I could just be digging a hole that I can sit in and drown in a lake of coke cola