Dr. Mundo Suggestion

Mundo's W is very lackluster. After some thinking, I was wondering if it could be changed to actually putting Mundo on fire, giving him a mini-Thornmail effect. A while ago, his E was shifted to give him MR, making it W always maxed last. But against some team-comps, the W I came up with would be better to max second. This would almost kill Mundo's waveclear, since minions would have to be attacking him to damage them. It would be an interesting change.