What is the best jungle item on Phoenix Udyr?

Runic echoes>lich bane>mercs>nashors tooth>ohmwrecker (or visage vs heavy ap)>deathcap

Sincerely, Udyr main.

Honestly I think you could build literally any jungle item on him and not suffer for it. I mean, you wouldn't want warrior on Phoenix Udyr, but any of the other three for phoenix would work well. Bloodrazor would help shred tanks and get more phoenix rotations out, while Cinderhulk would allow more survivability, and Runic Echoes provides more damage and movement speed while providing a lot of mana sustainability in the jungle. Then warrior is viable for Tiger stance builds on Udyr so he can easily utilize any jungle item.

Edit: xxUkarozxx suggested the strangest full damage build I've ever seen, please don't build that, you need some form of decent tankiness on Udyr in order to not get instantly blown up. I wouldn't suggest more than two damage items.

I don't play udyr but theorycraft: boots of choice.

or replace with

The immolate passive along with your e aura and abyssal will apply a lot of consistent damage. Nashers gives you cdr and more on-hit with the AS to do the cone of damage more often. Gunblade and blue smite give you slows to stick on people along with pretty good healing from your aoe damage. Then a tanky item with either bonus to your healing or another slow for whichever suits the game.