Leshrac

You should use Split Earth or Lightning Storm to secure ranged creeps during the laning stage.

Use Split Earth when opponents are likely to be stationary, e.g. when they are going for lasthit or deny. Also, use it immediately after Lightning Storm to increase chances of landing the stun.

Split Earth breaks trees which can be useful against certain heroes.

Diabolic Edict pulses give you a hint where the opponents' invisible hero is.

Alert your teammates to stack for you as you can clear stacks as soon as you hit level 6.

Leshrac is really good at taking buildings early on due to wave clear and Diabolic Edict.

You can damage a building with Diabolic Edict by hiding yourself in trees next to it.

Itemize for survivability and mobility to be able to position yourself in the center of the fight.

Leshrac is great at splitpushing due to mobility, wave clear and tower damage.

When opponents get Black King Bars, you typically need to kite those and itemize to survive their duration.

Pick up Aghanims Shard if you need to defend high ground or siege.

Leshrac is great at dealing with illusions and summons due to high amount of AoE damage.

Leshrac's Split Earth has a long cast point. Look to dodge it.

Leshrac's Diabolic Edict does great damage against single units and buildings. Organize defense quickly.

Pulse Nova converts mana into AoE damage. Fight when Leshrac is low on mana or burn it away.

Look to burst Leshrac in the fights or he'll do insane amounts of damage.

Magic resistance and spell immunity items are great against Leshrac.

Leshrac is great at split-pushing and ratting. Consider getting Boots of Travel on a core.