Medusa

Secure ranged creep with Mystic Snake if contested.

In order to get most of the mana back, Mystic snake needs to hit heroes and ranged creeps.

Ask your teammates to stack for you as you can clear them early.

From level 5, you can start clearing lane creeps quickly and farming camps nearby to accelerate your farm.

If possible, farm two neutral camps at the same time with Split Shot and Mystic Snake.

You don't have to skill Stone Gaze at level 6 unless you feel like you might be in danger.

If a neutral camp consists of multiple creeps with mana pools, Mystic Snake can regain you a lot of mana.

Use Manta Style with Split Shot on to farm extra creepwaves that you can't with your hero.

You need not rush Stone Gaze usage in the fights. Make sure opponents are committed to the fight before you pop it.

Position yourself in the center of the fight to Split Shot multiple heros. Medusa does mediocre single-target damage.

Mana burn is a big problem for Medusa. You can itemize against it or adapt the playstyle.

If things are going rough, consider purchasing Divine Rapier. Works well with Split Shot.

Your mana pool also acts as your HP pool. So remain aware of your current mana and keep it high with clarities and lotuses.

Play on the side of the creepwave to avoid being hit by Mystic Snake - Medusa's main laning spell.

Look to kill Medusa before she activates her Ulti. If Stone Gaze is up, turn or run away from Medusa.

Medusa farms quickly due to Split Shot. Smoke on her, place deep wards and block off camps with sentries.

Mana burning spells and items are great against Medusa.

Crimson Guard, armor items and Heaven's Halberd are great against Medusa.

Medusa is extremely squishy once her mana pool is gone as she has a very small HP pool.