I'd probably have something like a 16-35 f/2.8L and a 70-200 f/2.8L IS II, both on 5DmkIIs. But in real life, i would never do something like that even if i could afford it and was willing to carry both
More realistically something like a 24-105 f/4.0L or 24-70 f/2.8 on a 5DmkII. Maybe my 70-300 f/4.0-5.6 IS USM in my bag only if i was absolutely sure i was going to use it. I prefer to keep the weight down and am not a real telephoto kind of a person
a wide zoom + a medium long prime. depending on you brand and sensor size.
on a ff sensor, 16~36 or 14~24 is nice considering singapore's NARROW walkways.
prime of around 135mm is nice too.