Pathfinder 1E Pathfinder Damage Statistics Generator

[neofax]

I am looking for a program that shows the best weapon damage based on multiple criteria. Rogue with Weapon Finesse, TWF and +1 Keen Rapier and +1 Keen Dagger hits on average for 10 points of damage and crits 75% for a extra 8 points of damage. However, the same Rogue switches out the +1 Keen Rapier and +1 Keen Dagger for +1 Icy Burst Rapier and +1 Fire Burst Dagger. What would the difference be in damage? What would his/her chances be against a AC 16? I have seen something like this for 4E, but not for Pathfinder.