Let's see... if half the floors are residential, that would be just under 19.5 units per floor. Is that a reasonable number for the likely floor plate on this site? If so, then a reasonable guess for the total height might be 34x3m (residential floors, tower) plus 32x4m (office floors, tower plus upper podium) plus 2x8m (double-height lower podium floors, commercial) plus 4m architectural roof element including mechanical = 250m to the top of the roof.

If residential averages about 15 units per floor instead, then the same calculation with 44 floors of 3m residential, 22 floors of 4m office and 2 floors of 8m commercial, plus 4m rooftop gives a total height of 240m.

At 12 units per floor, the calculation with 55 floors of 3m residential, 11 floors of 4m office and 2 floors of 8m commercial, plus 4m roof-top gives a total height of 229m.

6m commercial floors instead of 8m would drop 4m from the total height in all cases. So the project (if approved at 68s) would probably be in the 225m to 250m range -- unless the rooftop element is more extravagant, in which case it could be somewhat taller.