It really depends on your personal situation and, what category of resort you like to stay in.
For us, we stay in a value resort and even combining a room discount with CDN tickets, FD is still a greater savings for us.
It’s hard to hypothetically calculate the room discount + CDN tickets but if I was to try to do it I’d calculate it with:
Deluxe 25% discount
Mod 20% discount
Value 15% discount
Tickets, were basically a 4 day ticket for a tiny bit less than a 3 day ticket when we bought them earlier this year.
This is really rough but hope it helps you run some approximate numbers.
The far easier way is, if you’re at Disney during the FD BB, book it.
If they come out with a CDN ticket discount + a room discount, run your numbers and see which is less. A BB can be cancelled up to 30 days before your arrival and you get your full $200 deposit back.