3weeks , im up to 110 in ninja exam sweeping every single day for these 3 weeks and not a single super kage scroll , my housemate tho only up too exam 100 has gotten 6 scrolls in 2 weeks . whats the drop rate for these dang scrolls.
Your housemate must be the luckiest guy around. It's only a chance of obtaining them at 100, if you want them guaranteed then you need to work on clearing 120.