I assume you meant FIU, not FAU. But any event, it does not matter whether it is Troy, FAU, FIU, or Mississippi Valley State ... it is all the same to the Overall RPI. So, what I assume you want to know is what the Cajuns' RPI rank would be with zero or one losses.
I addressed the topic of where the Cajuns would be ranked with a 46-0 record on the Ultimate College Softball Forum.
At 46-0, the Cajuns would have an RPI rank of 9.
At 45-1 the Cajuns would have an RPI rank of 10.
Brian