[Skarg]

Originally Posted by hcobb

Note that 5D roll can't succeed more than 84.8% of the time.

http://www.hcobb.com/tft/TFT_Saving_...rcentages.html

Hence the importance of Acrobatics.

Those increased auto-fail numbers are to represent things that are very difficult. A 5-die roll on the sum of two attributes is not a very difficult thing, so I wouldn't tend to apply those auto-miss numbers to a 5-die roll on ST + DX.