Arangol, 4.5 - 5m , imo, will be enough... I just wanted to suggest you to compare in-game sizes with real-life sizes. Also, try to make bridge less straight - it consists from 4 or 3 section, it is not solid bridge made from two parallel iron pipes or something... Don't appraise my sketch as guidance - it's just ideas as your ideas. It was my vision of your city for those moment. Glad if you like it. But if you like it, then your stalactites, that supports bridge, 2 times smaller then on my sketch. Also, i think Rast proposed nice idea concernd this supporting elements (search it in previous posts), why don't use it in second and fourth one?
Landscape are clear for 68%, i presume... You sad 100 meters height, Minetus. So, from the bottom of bridge to sea level we have probably 95-98 meters. In Russia, it will be 36-storey building... Even if the highest klyros building will has 10 meter high... (but i doubt that someone construct such huge/high building on reef in almost open sea (don't you forget that sea has something likeĀ flux, reflux, storm?))... 85m of open air - is too much, imho. It's something unreal, imho, such high stalactites will destruct all pleasantness and cosiness of klyros city

My propositions: cliff's height = 20-25 meters, bridge height = 3m.
Now, let's return to architecture style, friends

On this picture i marked mushrooms i found more original.

On this picture...Roofs as elements of house too small, and, also, without these roofs it will be common castle-like building with holes instead doors and windows. Sketch needs modification.
I found that klyros are very fond of decorative art magic, could it be usefull for you?