I don't quite know what skarner you're playing. He's still plenty fast, is pretty tanky, especially if u pump some points into his shield, and has good aoe clear speed for a tank. In the new jungle, I start toad and smite it immediately, with a leash. using Q as first skill. Then I get W after toad is dead, go to blue immediately. if laner is nice, try to get them to leash that too, but it's not needed. Kill blue. at that point, I usually go for wolves once my shield is up. After I kill wolves, I go to red, since smiting red gives a 20% health boost immediately. smite is enough to get me red, and I back after 4 camps, which is more than most junglers can do with this new jg. I honestly don't get E until level 5, I put 2 in Q and 2 in W off the start, as E is useless for jungle clearing, and with new jungle, I'm not really looking to all in for a kill until lvl 6, just scare them away before that if needed. I rush the item (sorry can't remember what it's called) that gives u the reduced cd on smite, as well as 50% damage from smite to nearby monsters, helps immensely with clear speed, and build that into the enchantment that gives 500 health and cdr.
I think that's the right one. After that I usually go for boots, then
which helps with tank, sustain, damage, basically everything. after that I change build depending on enemy. Usually get a
, if they have a really fed ad champ, will go
or
, if not, usually do a
. At the end, my build usually looks like
,
,
,
,
, and
or
. I'm pretty tanky at that point, also have good movespeed, atk speed and damage, and W adds even more tank. After u complete ur jg item, boots and trinity, should be able to clear the entire jg taking no damage. Hope some of this helped. If you ever wanna play, or have questions, im Im2shady4u13 on NA.