well i have played with him acouple of games and i diciided that he needs those masteries for a bit more sustain he is really squishy unlike leesin or udyr
well after like 2 games with these masteries everything went well i cleared the jungle easly and thats it i hope u give me some positive comments

well i have only played with these items because i can jump on the carry own him fast and get the hell out of the team fight
if u get CC'd too much u get go MErc instead of mobility but get more DMG
the "w" passive gives u alot of dmg late and mid , use it and youll see how fun he is
build the AVARICE IF YOU ARE SNOWBALLED
OR HEART OF GOLD
u can also build randiuns after u go brutalizer it will help you will owning thier carry
also in the enxt season randiuns active will be more affective that why u will be stronger

Frozen mallet - gives u the ability to assasin some one and get the hell out of there while ur team is shredding them apart :)

maw- gives u a nice passive and also u get magic resist with it
why not then ?! :D

randiuns- to shut down thier carry as much as possible

warmog- if u want to be more tanky and get them to focus u get it
also get it if ur team as enouigh dmg :)

when jungling take E first trust me with "q" its much harder
after e u pick w for much more ad and faster cleaning ull see that u clean wolves and wraiths so fast like 5 secs and done
max E and W as fast as u can it makes u so strong the AD bonus for the W and the mobility makes it so much fun for u to play him
ill update more soon hope u enjoy this and find this helpfull