How to solidify this build

[TheGamerMan757]

So, I was working on this build for my current character, and my only problem with it is that the bottom doesn't really look very solid. I want the whole build to look uniform, but it just looks like a keep on stilts.
Does anybody have a suggestion as to what I could do to make this build a bit better by giving it more structure on the bottom area?

Thanks

 

[Mihn]

The image is broken.

 

[TheGamerMan757]

The image is broken.

Oh...
Will this work?
http://imgur.com/OxSk40d

 

[Krookodile]

Slab blocks are really sturdy looking, I would also recommend fewer supports but thicker ones.

 

[TheGamerMan757]

Slab blocks are really sturdy looking, I would also recommend fewer supports but thicker ones.

Thanks!