Best Tuckin Backspacing and Offset for a 95 Splash 18"

i am lookin to get a set of 18's for my ranger and goin with a 3/4 or 5/6 drop...i know that they wont tuck on a 3/4 but if i go with a 5/6 does anyone know what the best backspacing and offset would be in order for it to tuck nicely?