In Mahabharata during thirteen year exile which were the weaknesses that Pandava improved upon?

During their thirteen-year exile in the Mahabharata, the Pandavas focused on honing their skills and overcoming their weaknesses. Arjuna intensified his Archery training, mastering various weapons and learning new techniques, while Bhima developed his physical strength and combat abilities. Yudhishthira worked on his strategic thinking and leadership qualities, and Nakula and Sahadeva enhanced their knowledge of herbs and healing, as well as their skills in horse riding and sWordsmanship. This period of self-improvement ultimately prepared them for the challenges they would face during the Kurukshetra War.