What specific bike handling skills do you think are most crucial to master for a cyclist whos been out of commission for an extended period, and how do you recommend they prioritize their training to get back up to speed safely and efficiently, considering the need to rebuild both physical strength and bike handling confidence simultaneously, and are there any particular drills or exercises that can help a cyclist regain their edge and cornering abilities, especially when faced with varying road surfaces, tight turns, and unpredictable obstacles, and how do you think a cyclist can effectively balance the need to rebuild their endurance and stamina with the need to focus on targeted bike handling skills training to avoid plateaus and prevent accidents.