First time making guide so forgive me for bad things. This guide is about playing Udyr differently, but in Jungle. It has a strange but to my mind nice item choice. Jungling with runes and masteries is very easy. Udyr is also a potential ganker. This guide is about making him Phoenix DPS Jungler.

I take and for the attack speed. Couse Udyr is an auto attacker so attack speed is essential for him. Because you will fight with you need to make as much attacks as you can because every third of your attack will high damage.

Greater Mark of Desolation and Quintessence of Desolation for armor penetration. It synergies well with attack speed. Armor penetration let you to take out tanky enemies faster and you don't need to buy any more armor penetration items.

I take offensive mastery page for more damage and easy jungle. This guide is not about off tank, you will be the one who is making damage, so offensive masteries is perfect for you.

Definitely .
is a way to counter attack and a way to save your life too. So that is kinda cool.

I take simple route.

Wolfs --> Blue --> Wraiths --> Red --> Golems --> Wraiths

Start with tiger first hit, then phoenix, hextech for slow.

Everything happens in 5s:

Turn on Tiger
400dmg Tiger stance first hit (Trinity applies)
Turn on phoenix, slow if needed
108.25 * 5 = 541.25dmg (Phoenix active flames)

126dmg Wit's End (approximately 3hits)

306 + 204 + 204 + 253.5(AP 3rd attack)= 967.5dmg (approximately 3hits)

Hextech if used 300dmg

5seconds overal DMG: 967.5 + 126 + 541.25 + 400 + (300)= 2034,75dmg (2334.75)

In reality this is higher..

Correct me if my countings are bad, I may don't know all the counting things in LoL.
Remember that damage also increases from masteries which is not counted in here.

I want you to try out my guide and comment if you found it comfortable or not. Guide is not done yet. Thx for your Time