There are a number of ways this could go.

Despite what the City's AIC says, it can't be 771 alone since that property includes 769 and 773 as well (totaling +/- 756sm). Given that the listed GFA is 23,636sm, you can't achieve an FSI of 24.8; it comes closer to 31.2. When both 767 and 765 are included, the FSI goes down to 18.6. It seems, therefore, that it includes 767 but not 765 (resulting in an FSI of +/-24.59). If we triple the lot area for a podium (+/- 961sm x 3 = 2883sm) and subtract from the total GFA, you end up with +/- 20,753sm for the tower alone. Divide that by a few hypothetical floor plates (750sm for regular efficiency and tall building guidelines, 539 for a reduced size covering only 769 to 773, etc) you find that the numbers come between 27 and 38 floors. Discount the silly ones (eg. a full 750sm) and you can safely assume that you'll be getting between 34 and 38 floors for the tower and 37-41 for the total structure here.

I too love tiny little floorplates

@G.L.17 since they keep the rhythm and cadence of the street intact while piling on huge amounts of density above. It's why parts of Mid-Levels and Mong Kok are my favourite in the world.