The standard answer is to just make it sound like you would like it to sound. Leave the rest up to the engineer. Just about all of the no no's can be taken care of by the engineer if need be. Don't worry too much.
If you want an extreemly loud 12" single you have to keep the high end under control because the cutterhead will draw too much current and explode otherwise. The practical result is that the high frequency limiters will clamp down and you will lose it anyway. The low end is usually no problem because the pitch (groove spacing) is wide open anyway.
If you want a very long LP side then you can save space by cutting low end. I would suggest leaving this up to the engineer. There is no way to guess what might need to be done. I do my best to do faithful transfers. I only change things when absolutely necessary. The high end usually isn't a problem on long sides.
Don't try to second guess what the cutting engineer will need. I do a lot of cutting. When I master a 12" single I feed it through the lathe electronics and do test cuts to see how it will behave. Sometimes I even guess wrong
