Jax experiences a significant power spike at level 6 and with Sheen, enabling him to deal massive burst damage, especially with his empowered W ability.While he may face mana and sustain issues early in the lane, overcoming these initial weaknesses transforms him into an overwhelmingly strong duelist.Utilize Grasp of the Undying rune and Spellblade items (like Sheen) for powerful Q-W combos to pressure opponents, and maximize combat sustain with his ultimate.