@User Trying to do that, but macros have trouble in that macro placement fails.

Consider a manual placement. The macro placement is not very good.

I will try now and report.

I saw some cases where they get put in corners and stuff

Macros go to corners when locations not specified. Putting manually at fixed points greatly influence the detailed routing. But looks like detailed routing is not working very well in the simplistic designs too. do you have some guidelines to follow?

Make sure to add halo options too for detailed routing so it can access pins...

You mean FP_HORIZONTAL_HALO ? 10 is default. What is your recommended value?

It depends on how many pins/congestion

Ok, I will try values and then report.