lane -> jg -> carry

This build relies on your Burrow to do most of your damage and escape fights. The strategy is to dive in with your high movement speed, do as much damage as you can and then run away. After 7 minutes start Jungling next to your lane, stay nearby until your Guardian is destroyed or until you destroy the enemy laners Walker because it's really good to utilise the lane shop while you still have it. Gank your teammates so that they aren't mad at you later in the game for farming bottom Jungle while a lane is being shoved by the entire enemy team. Prioritise farm because Mo's farm capabilities are insane. Minion waves will provide more gold if you're in a lane by yourself, but kill as many Jungle Camps as you can. You should have either the most Souls in the game or the second most Souls in the game (by the end). Even if you're doing terrible at the start of the game. Use your Burrow to target objectives for your team - breaking Guardians and Walkers is easy for you. Learn how to bait the Walkers stun with your Burrow. Also, learn how to take the Urn with your Burrow.