Challenging Rank 160 within 45 Days!

I found a deal on a certain point-earning site to reach Rank 160 within 45 days, so I'll try to see if it's possible without spending money! Without spending money and without pulling 'Shiro', you'd probably be around 120 in 30 days and 140 in 45 days. It's likely impossible without spending money, but with the chance to pull 'Shiro' right now, maybe... I'll post a summary of the first day later.