Reduce Ornn's Brittle duration
Many melee chamions can't viably dodge Ornn's W. So they have to back off and wait til the Brittle wears off. Sadly this debuff lasts like 9 years and a few levels later his W cooldown is the same as his Brittle debuff duration, making it impossible for some melees to ever have a window of opportunity to fight him.
main btw
build Banner of Command split push mid, let your melee minions gold farm yah
defecated on him.