Which elements should I use in logo?

I have two types of logo. And I am not sure if I need to use skyscrapers in this logo. I am use, because of the name of company - Skyline. But maybe it’s not required? What do you think about which elements should I use in my logo? Thanks.

I have two types of logo. And I am not sure if I need to use skyscrapers in this logo. I am use, because of the name of company - Skyline. But maybe it’s not required? What do you think about which elements should I use in my logo? Thanks.