I have finally finished DMing a Dragnacarta style Curse of Strahd with my party of mostly 4, a fifth left halfway thru. Twas a party consisting of:
Ukabo the Shadarkai grave cleric.
Ding Ding the half dragon Kenku Creation bard.
Frug/Vulrin the insane two personality Dark Gnome arcane trickster.
Tordak the Duergar champion.
And River the escaped Santa sweat shop Elf alchemist.
I had them choose a relic at the beginning that they felt was appropriate and I worked with them to incorporate it into their background and their background into the story of Curse of Strahd. When they got to their part of the relics story they acquired some additional power appropriate to their them and their level. Before fighting strahd they had saved the Martikovs and were gifted the Wereraven abilities which I had activate in full once they had fallen once to strahd. Only Tordak didn't want that.
The fight with Strahd was truly epic with 3 phases of ass kicking and additional magic items for Strahd such as the Sword of Kas, Robes of the Archmagi, and a Ruby spell gem holding the 8th level maddening darkness spell. His final form I changed to that of a Huge bat creature stealing stats from the Sonari bat from DM stash. I also had ireena choose to become a vampire thru the Vampyr and properly accept the gift by slaying her father(who was brought back as an undead knight thru the Deck of many Things) and then slitting her own throat( this was to fulfil the original condition of needing to kill someone you love and be killed by someone you hate).
The final hit came from the rogue Vulrin, who overcame his insanity, and delt a Critical sneak attack of 70 damage with the last strike. In the final moments he rallied everyone to one last strike as the huge vampire lord fell from the sky, every one using their best signature attack, and driving Strahd to the ground of the towers balcony with the sword of sunlight in his chest.
The after party was quick and simple, with Ireena choosing to reuse the fallen castle Ravenloft, which was flying during the battle and had fallen after Strahds death in front of the amber temple. She uses the Amber temple to fix and power the flying castle once more and take these dark powers away from this land forever. Going with her is the Keepers of the Feather and Ezmeralda and a few others who will use the castle to enter other Domains of Dread and free them from their own Dark Powers.
And thus my players and their characters now go their separate ways in life and in game with me moving soon and two others having a baby like NEXT WEEK so I definitely felt the time crunch to finish this. Thank you for those that read all this and good luck with your own campaigns.