That said, I bring you a map with a set height of 1 grand. Everything in the game is capable of climbing the ramps (to my knowledge).
That said, I did NOT use a typemap for this. Typemaps work for super high maps but imo it looks really silly for a tank to be climbing a 60 degree slope (actually imo it looks odd for anything to be climbing that steep of a slope).
In doing this I am trying to come up with work arounds/practices of higher height maps (without using typemaps).
Some of the conclusions I've come to is that your slopes need to be quite long and your hills need to be quite big (resulting in a bigger map). Also, you have to take artillery tanks/structures into account because they gain significant range at higher heights.
Check it out, I believe it is a good example of a few things, and it seems to be quite entertaining to play.
Download here:
http://fileuniverse.com/?p=showitem&ID=2783
Screens:



