If you have poor reaction speed or hate being kited, Heavy will frustrate you. If you love the feeling of a single, clean read winning a fight—of being the final boss that a freshie runs from—then pick up the Enforcer’s Axe.
Do not swing first. Walk forward. Parry their light attack. Immediately feint a charged M2. 90% of players will parry early. Release the M2. You just did 30% of their HP.
In the depths of the Luminant, where one mistake means a trip to the Fragments, the Heavy player makes one thing clear: You can run, but you can't block.
After they get knocked down, do not stand still. Jump forward and use your weapon’s Critical (Hold X) right as they get up. Most heavies have a ground-hugging critical. They will roll into it.