The Nasty R has the thinnest blade out of all the sticks we currently offer, so if you're looking for a thinner blade that is as stiff as the SuperNatural, you might want to try that. Your best bet is a fitting session, where you'll be able to try out different sticks, blades, shafts, flexes, curves, etc. That way, you'll know for sure if you like a blade, shaft, or stick before you buy it. Soon, you'll be able to try out different blade stiffness as well, so stay tuned.
As for another closed toe curve that's not as deep: I don't think we currently offer a curve exactly like that. The BC10 Russell (a taller Hossa pro) has a straight heel which is good for stickhandling, but it's a lot more open and still very deep right at the toe. Are you a lefty or a righty? There are a few pro curves that are only offered in one handedness, so there might be an option for you there.
There's also a certain "classic" closed mid-toe curve that we don't offer right now but that I inquired about recently. That might be exactly what you're looking for: A stickhandler's dream. We have a spare blade with that curve, but we'd have to digitize it first in order to offer it on our sticks and as tapered blades. Again, stay tuned for a lot of new developments in the next few months!