Singed will often look to proxy the first wave between the two towers setting up huge early pressure leading to gold and experience leads. Singed can’t fight both you and the minions simultaneously, so escort your minions as they walk to lane to force him to walk back to lane.
If Singed is able to proxy farm you, just let the enemy minions hit your Tower and focus on farming what you can. Do not lose tons of health trying to tank the minion wave.
Do not chase Singed. Chasing Singed is a bad idea as his Q deals a lot of damage if you’re in it for too long.
Expect Singed to stay apart form his team during the mid and late game. He will try to split push and take objectives. Make sure someone who can contest him is sent to a side lane to stop him.
Forcing team fights when Singed is unable to influence them is a great idea and forcing a fight 4v4 or 5v4 will help you win the game.
If Singed does join the team fight, you’ll need to disengage and back off whenever he engages otherwise he could use his E to Fling someone into his team. Disengage and poke will reduce his chances of getting a good E off.
Singed’s level 1 is strong in the right matchup. Expect him to proxy farm the first few waves to get an early lead.
Once Singed hits level 6, his kill pressure and overall annoyingness increases. Once he activates his Ultimate R, it would be a good idea to disengage and avoid fighting him.
Singed is really good in the mid-game as he can draw a lot of pressure. At this time, he will have lots of damage and be super tanky and fast. It will be hard for you to kill him alone.