Turbo size is the easiest way to restrict performance for a person setting up rules for a class. Some racers like to be told what size their compressor has to be.
I chose to run a compressor size that would run in an efficient range with my application. Yes, I do have to use nitrous to spool it before she leaves the line. That is one of the trade offs with my combination. It wasn't a big deal for me to do that, though. For a person who is scared to death of nitrous, such as yourself, I'm sure it would be a big deal. My suggestion to you is, stick to the Happy Meal. A Big Mac isn't your style.
After she leaves the line, it's nothing but efficiently boosted air. She loves the compressor size. She's spoiled, you might say.
You prefer to compromise your compressor size and efficiency so that you can spool the turbo up easier. You don't want to make things too challenging for yourself. I can understand that. I'm sure she is used to your compromise in compressor size.