Riki

Use Blink Strike to secure ranged creep last hits.

When in trouble, blink away, Tricks of Trade over a cliff or in treeline, or Smoke Screen and teleport out.

Check opponents' inventories frequently for detection.

Avoid passing by spots that are typically sentried like rune or pillar spots.

Prioritize dealing with backliners and supports as Riki is great at gap-closing.

Take your time to farm the Diffusal Blade which will significantly improve your pick-off potential.

Pick up Aghanims Shard around minute 15 to isolate enemy heroes stuck in Smoke from getting help.

Against Riki, carry detection on multiple heroes.

Pair Observer Wards and Sentries on the map to track Riki's movements.

Protect your supports from being killed by Riki.

Items and spells with stuns and roots are great against Riki's mobility spells.

Force Staff and Hurricane Pike, allow you to move out of Riki's Smoke Screen.

Break effects disable Cloak and Dagger and prevent Riki from being invisible.

Once Riki gets Aghanims Shard, you will need your own mobility item to get out of Smoke.