How can a rider effectively balance the need to conserve energy on long climbs with the necessity of maintaining a high pace to stay competitive, and what specific pacing strategies can be employed to achieve this delicate balance, particularly in mountainous stages where the risk of blowing up is high. Is it more beneficial to adopt a consistent, steady-state approach or to alternate between periods of high intensity and active recovery, and how can a rider gauge their optimal power output and cadence to maximize efficiency while minimizing fatigue. Additionally, what role do factors such as nutrition, hydration, and bike setup play in informing a riders pacing strategy, and how can a rider adapt their approach to suit different types of terrain and racing conditions.