Playing as Rek'sai:

Keeping tunnels spread out across the map will ensure you have choices when you want to cast Void Rush.

Cast burrow before travelling around the map to take advantage of the increased Movement Speed and the safety provided by Tremor Sense.

Tremor Sense can warn you of enemies closing in, and is particulary useful when entering enemy territory.

Early jungle for Rek'sai is pretty hard. First of all you have to concentrate on farming to get core items gank only if you see that you can take kill or give for your mate easy.

Make as many tunnels as you can in enemy jungle that you can any time use your Void rush to kill somebody or help for team.

Always when you have full bar of fury use burrow to heal you back, it's only sustain when Rek'sai don't have Life steal items.

To knock up use your tunnel or flash for quick assasinate, also big movement speed is really good for Rek'sai