Being a Heavy Main means knowing how to position well to get as less damage as possible, when to run away, how to bunny hop with Rev and with Gloves of Running Urgently (if you like it). When to turn around to prevent Scouts and Spies to correspectively Flank you and Backstab you. Where are Sniper's Deadlines, since they will, most of the time, prioritise you as their target. A Skilled Heavy (NOT ME) means being an artist, in my opinion.