I made a Google Spreadsheet that calculates the odds of various dice results. You can put in the number of attack/defense dice, Focus tokens, Target Locks, Evade tokens, and whether the attacker has the Gunner upgrade. The sheet will then give you detailed stats like Mean Damage, Hit%, Mean Critical Hits, and probability of each possible damage result.
Let me know if there are any additional stats you'd want to see or config options to change.
https://docs.google.com/spreadsheets/d/1YrPMS-cdTpd4ASeQrlh5sGDD_hjpF0SbNRh8VEwm9UA/edit?usp=sharing
This link is read-only, so to edit values make a copy into your own Drive folder.