You can use Assassin's Path to get behind the enemy and set up for Noxian Diplomacy's melee attack.
Shadow Assault is a powerful escape tool, but can also be offensively used to assault a group.
Remember to pick your target before the fight. Focusing all of Talon's abilities on one target can be very rewarding, but splitting them up between many may leave you helpless.
Talon's attacks are all physical damage. Build armor early to counter his burst damage.
Talon is heavily reliant on Shadow Assault to escape a fight. When it is down he's significantly more vulnerable.
Talon has unrivaled roaming ability. Make sure to keep track of his position or force him to stay in lane by pushing aggressively.