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30-100? use a putter. if you want a midrange/approach disc, try a classic roc. different than the regular, it has a smaller diameter and is more like a putter. if you want an actual midrange disc, there's a lot to choose from. it should be about what feels good, but the straightest flying midranges from a few of the big companies are innova's roc (i'd suggest a glow roc), discraft's buzzz, and latitude 64's core. if you want something that goes left everytime, you could go with a wasp, drone, lat 64's pain, innova gator.
i use a latitude 64 gold line fuse and an innova star spider. i like to hyzer flip pretty much every shot so i chuck the spider when i want it to finish left or straight, and the fuse is for big hyzer flip straight shots and turnovers.