User blog comment:ClariS/Escalating Return: Damage Reduction/@comment-220.255.1.169-20120819182941

But to get leviathan on a max stack is very rare... You nid about an average of 4 teamfights to make it happen... or 7 skirmishes. Without you getting caught or focused down because out of position and whatsoever...

Still, good point but i dn think everyone can get dmg reduction easily... Hence the armor and mr option is better ans easier.