The Orange Tortex! My fave. I like the Yellow Ultex with the Rino too, but they're hard to find when you drop them on the floor.
Try nylon picks; with use, they get a bit 'ragged' on the bevels, nice and scratchy. I have a Dunlop 0.88mm nylon that I don't use because of that very thing.I need to hear sand paper against my strings. Anyone know of anything sand-paperier than gator grip? I will sacrifice shape, profile, grip, feel, tone, everything... I am a scratch addict and there is no going back