Try this mach1.met. Just copy it it your game folder. Don't forget to backup the original file.
Play only new skirmish maps with:default starting resources low starting tech-level fixed position
Every skirmish map default BMUs is 50k. Low tech-level means low for you and medium for the AI. Fixed position makes the AI always ally with each other. Constructors and technicians are faster and better.
If you want any other enhancements just follow Judas modding guide. It's simple and can let you adjust the skirmish levels to be quite challanging :)
If there ever is going to be version 1.6, here are my wishes:support for 1024x1024 textures option to further increase draw distance (LOD) if anyhow possible I would like an option to disable ion cannon and nuclear silos in skirmish modes, make them unavailable to build add an option for more resources, like 100 000, because AI is very poor at resource management and eventually gets stuck, so to give them a chance in skirmish. It would be interesting to see what would happen.