Thresh vs Galio

Open with Flay (E) before Death Sentence (Q): the slow makes the hook much easier to land.

In lane, space out your autos: Flay (E) charges them passively, and the longer you wait between two autos, the more damage they deal.

Don't recast Death Sentence (Q) on reflex: the target is already being pulled toward you, and jumping on them often exposes you for nothing.

Throw Dark Passage (W) toward an ally in trouble before they need it: they can click it to come back to you, with a shield.

Place The Box (R) right after a successful hook: to escape, the target has to break a wall, and the first wall broken slows them and deals full damage.

Take a trade after Justice Punch (E): it's his only dash, on an 11 to 7 second cooldown.

If you deal physical damage, lean on it in trades: the passive shield of Shield of Durand (W) only absorbs magic damage.

Leave the area while he charges Shield of Durand (W): the longer he charges, the longer and wider the taunt.

Before diving one of his allies, check where Galio is: Hero's Entrance (R) flies him in from long range to an allied champion, and his landing is a knock-up.