Originally Posted by dabudabuda
If the two strings are distinctly different then it makes sense to combine to get the characteristics you like from both. The RIP seems good for the mains in your setup for the added control. I personally do not prefer full multi, gut or a hybrid of these as I like the added control of hybrid with a poly. I have though a couple times done Isospeed Classic in the mains with a natural gut in the cross to get more of a controlled response compared to gut/Isospeed.
It also depends on your racquet. I use a very headlight, control racquet with a 95 head. Not sure I would use this setup on a 100 head more evenly balanced.