How to use balancer to reduce very large scene?

I am a balancer user for many years, and recently I tried to reduce a very large scene which contains many buildings(See https://pan.baidu.com/s/1OKmz52AB0CJvqqIOC5Iy1A). And I can't reduce it to a desired face count(200000).
I tried quadratic-error simplification method with Meshlab, which can generate an accepted result.(See https://pan.baidu.com/s/1RyYxM7UTewc_MaroIpmYNQ)

Are there any options of Balancer I missed for deal with large scene?

Thanks.