Lich

Make use of the slowing part of the Frost Blast to chain couple of right clicks.

Secure ranged creep last hit with right click or Frost Blast when your core cant.

Play aggressively on the lane, burn your mana and then run a clarity while pulling.

At level 6, you can even solo kill opponents if there are creeps for Chain Frost to bounce.

Frost Shield is great for defending towers and delaying the enemy push.

In fights, be quick at saving allies with Frost Shield and defensive items. Use other abilities afterwards.

When not much is happening, push out side lanes with Frost Shield and Blast.

You can quickly farm enemy summons or the big creep in jungle camps using Sinister Gaze.

Lich is a strong laner. Bring extra consumables.

Frost Shield from Lich significantly reduces damage taken from right-clicks and it can be used on towers.

Split up when Lich uses Chain Frost or run towards a group of creeps to pass the bounce away.

Avoid fighting in choke spots and clumping up against Chain Frost.

Magic resistance and spell immunity items are great against Lich.

Lotus Orb is great at reflecting 3 spells of Lich.