I purchased a few 23.3mm TIR optics for my 21700 lights, to test them out (and replace a smooth reflector with mild artifacts). Found out that the 30º frosted is my favourite, it gives me great smooth flood without losing the central spot and its modest but usable throw. Here it is on my Convoy S21A :
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(click to expand, I used thumbnail upload to not clutter the page)
Last night I used this very S21A to walk to my favourite pizza place (mentioned a few times in this thread). The sidewalk is very wide (like 4m+ wide, it serves as a driveway for cars and can be repurposed to expand the tarmac area if necessary) and barely lit by the streetlamps on the opposite side of the street, and with this optic I could keep the S21A pointed down the centre, at 10% power, and illuminate the whole thing left to right, with throw to spare. I could turn my head in any direction without moving the torch a centimeter and still see everything. No tunnel vision here.
The only downside is I had to take off the glass lens to fit the TIR, so now I need to be careful to not drop it in water. Not a huge deal, I'll take the tradeoff.
The other TIR I got is 45º beaded. It has a pretty uniform beam, but not really any floodier than the 30º in practice, and I lose the central spot. It beats the aforementioned reflector, but I don't like it as much as the 30º.