Ibanez IEGS8 E-Guitar String Set 009

I play an 8 string Ibanez. I got an RG8EX, modded it heavily with Hipshot, Tone Ninja and Gotoh hardware. Put a set of Lundgren M8Cs on it and it plays really well. It came with 9-65 strings stock, so I swapped to the same gauge, hoping to get a familiar feel, but then I downtuned to F standard and the strings turned into wet spaghetti, so they only work with standard F# tuning. Bought myself a custom 10-80 set and they fit nicely for my tuning. In conclusion, the 9-65 are good for F# standard or perhaps F standard if you like looser/softer strings, but I personally like mine to be tight and stiff.