Re: your original thought on the using the TS as a "treble booster," I've liked the tones I've gotten when I've used a TS the way you're describing into an already dirty amp. I've actually done it with the tone at 100%, and running at 12v (which makes it sound a little brighter). However, while very beautiful sounding, it doesn't sound like a traditional treble booster (and thats ok!)
(NOTE: from what I've read and my own experience, 12v is ok for an ibanez TS, but 18v is not always. I can't confirm this, but what I've read is that the parts are rated such that 18v SHOULD be ok, but given their tolerances, it would be safest to only say it can handle 16v safely)
Catalinbread Naga Viper
Another great great pedal that does a few different things (treble boost being one of them) is the DryBell Unit 67. It makes everything sound better. It can do the Queen thing and much more. Awesome pedal.
I disagree with this. I love treble boosters, but I was actually pretty disappointed with the Naga. It's just my opinion and all that, but I didn't think it did a good job of doing the upper harmonic "thickening" that you hear with classic treble boosters, and surprisingly noisy despite being a more modern design. On that note, though, the fact that it wasn't designed in the middle of last century does mean its more versatile than some other treble boosters on the market.
I'd recommend the Fulltone Ranger - more on that in a sec
My favorite treble booster is still the Analogman Beano Boost. It just "does the thing" so incredibly well - its just the right amount of fat and cut, just the right combo of smooth yet raunchy.
That said, I still recommend the Fulltone Ranger if you're just starting to use treble boosters. The reason is simply that its rotary switch and internal trip pot allow you to dial it in for your rig much more than a lot of other treble boosters on the market, and its overall excellent. Tonewise, the Analogman is perfect to my ears, but the Fulltone is 95% of the way there AND has A LOT of added flexibility.
Not sure if you've started looking yet, but one thing about treble boosters is that they're generally expensive. However, that also means that buying from a boutique builder like Analogman doesn't actually cost much more, if any, than a lot of the other offerings out there.
Just my 2 cents. Sorry to naysay you, Bogner