Production races are the fastest. They can expanded quickly and can build more research buildings in less time. The best of the production races is unification, tolerant and production+1, large hw, repulsive, -20 ship defense, -10 ground. Unifiction is +50% food and production, and no moral penalty. It also gives +15 spy defense. Tolerant increases the population limit because it treats all worlds as terran, and it elminates having to worry about pollution. Production+1 has good synergy with tolerant and unification. Another good one us unification, aquatic, lrhw and prod+2.