For runes I just go with my ATK SPD + armor + CD * ATKSPD25% (Reds+Quints) * Yellow Armor Seals * Blue falt CDR runes (7.50%)
Then masteries: 2/19/9 2 on butcher 19 on w/e 9 to get Rune affinity
Definitely smiteless on the blue buff - sometimes I invade It's not 'super' slow, but not as fast as the other known used junglers. It's the ganks however which balance it out. Especially at 6, bot usually is my first kill.
I'm an experienced GFXer! Hit me with requests (that is to say if I'm free or not) =P