Here's a very simple roller for Zmud that I use. It's got no bells and whistles, it just works. Just change the 93 there to whatever value you want to see on your total rolls at a minimum, and away you go. Oh, and make sure under the options for that trigger, you make it fire on "prompt" and NOT on "new line". Should be much easier to modify this to accomodate charisma.

Pattern: ^&{str}str &{int}int &{wis}wis &{dex}dex &{con}con &{chr}chr Accept these stats~? ~

Value: #IF ((@str+@int+@wis+@dex+@con)<93) {n}