Redsmite is a little too op.

Challenging Smite can be cast on enemy champions, True Sight icon revealing them for 4 seconds, reducing their damage against you by 20% and making them take 60 - 162 (based on level) true damage over 3 seconds from your basic attacks for the duration.

This item lets junglers easily 1 v 1 people. While I think a jungler item designed for 1 v 1s are cool, I think this item is too strong. And when tanks get this item, it lets them 1 v 1 quite easily without any damage items.