You could hardly be more wrong: -Serpents are not faster than other transports. They are neither more nor less suited than any other faction. -Fire Dragons are important to take pressure off a point but countering a good rush is exactly what they can not do. Hitting a point fast and in force, taking it before resistance appears is the best counter-strategy to strong AV. Besides: Would you really prefer pure, brute force, back-and-forward gameplay with no tactical element whatsoever? Because Hold the Line and Fortresses do exactly that: Only one point available at a time. Now imagine that, but with unlimited spawn-tickets.