This is time consuming if you dont want to buy packs from MS store....
You want to unlock darts challenge and try and get all 10 darts on bullseye
This will net you 20 tickets and 10 tokens you want to earn as many tokens as possible and try your luck on the disk o slot,
On disk on slot if you manage to hit both yellow and purple orb and get it into the 10 slot you get 50 tickets per 2 tokens which is probably the fasted way
Yellow orbs give you x2 tickets and purple give x3
So if you hit yellow orb and 10 that's 20 tickets per 2 tokens
Or if only purple and 10 that's 30 tickets per 2 tokens.
Not 100% sure on how many tickets is needed maybe around 31,000
500 tickets per item
Edit: As mentioned in the comments it is 27,000 tickets needed :)