Doom is honestly one of my favorite heroes. He can be put into literally ANY role because of how versatile he is. MAKE SURE YOU PRIORITIZE FARM. DEVOUR/MIDAS A CREEP WHENEVER YOU CAN. I seriously cannot stress this enough.

Creep Guide:

Ghost Camp -Early game laning (suicide lane)

Centaur Camp -Early game laning phase (easy lane)

Wolf Camp - Hard carry mode

Ogre Camp - Jungling from start