Build and Runes
Ignite significantly lowers Mundo’s Health regen from his passive and ultimate.
If Mundo can’t be bursted by your team when he turns on his ultimate, ignore him until his ultimate ends.
Mundo ganks can easily be averted by dodging the first Cleaver.
If possible try to slow him during chases and Dodge his cleavers. If he lands more than 2 cleavers on you in a chase you are Doomed so it’s Definately necessary to Dodge the cleavers.