This calculator will randomly simulate a climb to legend given your multiplier and winrate over a number of runs of your choice.
Multipliers correspond to ranks as follows per Celestalon:
Bronze 10-1: 1 (Current rank 25)
Silver 10-6: 2x (Current rank 20)
Silver 5-1: 3x
Gold 10-6: 4x (Current rank 15)
Gold 5-1: 5x
Plat 10-6: 6x (Current rank 10)
Plat 5-1: 7x
Dia 10-6: 8x (Current rank 5)
Dia 5-1: 9x
Legend: 10x
(Maximum is 11x)
Winstreaks run all the way until Diamond 5.