Use E to last-hit minions or champions to avoid health loss, and use W to reset your auto-attack.
Your ultimate does not remove 'Airborne' effects, so be cautious against enemies with knock-ups.
Do not engage first unless you are fed or your team has a clear advantage.
Although Mordekaiser prides himself in brawling, he does not have a chance against Olaf. Use [Q] well to deal damage while being careful when you use [Q]!