17TS-E, 24TS-E L II, 70-200 2.8L IS II
Or 24TS-E L II, 35mm L, 70-200 2.8L IS II
The reason is I enjoy landscapes most. At the same time the 70-200 is suitable for portraits too...
But, believe it or not it was a really tough question!
It is difficult to exclude lenses and sometimes you have to travel light...
P.S Actually if I was interested only in landscapes in a specific trip I might get 70-200 f/4L IS instead of the 2.8 and save on weight even more!