The OP did.
Not a chance… maybe slight chance with carpet bombing… if they are lucky enough to pass the mob waves…
I would rather bring healers and carpet bombing items…
But Carver and Pixie… maybe I will replace Kadilen (her skill is conflicting against Cyprian’s Riposte) and Master Lepus (I don’t think ice/blue is a good color as there are 2 green bosses)…
Maybe because it become a platform to rant against ranting.
Maybe you can mail the OP if he want to close this thread.
When y’all troll someone, no matter how deserving some think him to be, the rules get invoked.
Sorry, that’s the gig. (And Rules get invoked all around, not just to some.) 
If you want to discuss this in further detail Rigs, my door is open in Line: chibipotato16
I got better things to do
Aaaaand:
I’m curious if it’s possible to win the final level using the OP’s stated heroes? I’d try, but I don’t have them all… 
Use 5x harpoons, dragon attacks, bomb attacks, and axe attacks.
Try to get lucky and pass the mob waves without using any items, if you do, victory is guaranteed.
12k credo che hai sparato alto?!
Moderator’s Note
I’ve moved the strategy recommendation posts in this thread to the main Santa’s Challenge thread: 🎅 Santa's Challenge 2019: Teams, Strategy, FAQs, Discussion, and Links – Christmas Event
If anyone would like to continue discussing strategy, or would like help with their own attempts to beat Santa’s Challenge, please do so in the thread linked above.
As the OP hasn’t returned and didn’t seem interested in help with beating Santa’s Challenge, this thread will be closed.
If the OP would like to contact Support about the gem usage, they can do so by following the instructions listed here: How to Contact Support (v1.9.7 onwards)