Hi, my main character is a lightning dw melee trickster, but after reaching level 100 I think its not as good as other builds.
So i was thinking about using Kobas Fury Set http://www.grimtools.com/db/itemsets/113 to change my style but I dont really know which skills i should use now and where to put my devotions points now. I guess cold and bleeding damage would be the main damage output for the build.
Any advice?
Yes Korba’s set is for Cold-Bleeding Trickster.
It’s actually convert your Savagery’s Lightning damage.
70% Lightning Damage converted to Cold Damage to Savagery.
Nice to see more gear options for Trickster builds 
For Pierce-Bleeding damage variant, just use Mythical Brutallax instead.
It gives 100% Lightning Damage converted to Piercing Damage to Savagery.
Unfortunately I can’t test it yet, currently I don’t have the Korba’s Fury set.
I’m interested in this too, I’ve wanted a cold Trickster for as long as Shaman has existed. I’ve noticed that using a Mythical Bane of the Winter King seems to be competitive with, or maybe even better than, the two axes…but I also love Ring of Steel and woud like to incorporate it in the build. Decisions, decisions.
It is cool isn’t it when the gear now support cold damage to Shaman, and nice synergies with NB 
More love to RoS 
DW Cold Savagery Trickster is born 
Trickster is a pretty weak class imo, but maybe with that gear set it would work better. I played around with grimtools for a while and this was the best spread I could come up with http://www.grimtools.com/calc/RZR9nJPV. If you don’t end up needing the damage absorb from primal bond to avoid getting bopped, stormcaller’s would certainly be higher dps.
I did a cold/bleed version in testing with the full set just to see how it is and it works fairly well, but honestly it’s way better to ditch those mediocre weapons for some cold daggers and go allin on cold damage.
Basic skills = max lethal assault, burst+dance, get all wps minus whirling death to 5+. On shaman side max savagery+tenacity, heart of the wild, wendigo totem, wind devil for -ele rr, and 100% go stormcallers. If you have enough issues surviving that you need bond here then something is wrong
Devotions=chariot, leviathan, quill, toad, wolverine, ultos, murmur, ele storm, etc
If you wanna be true Korba guy then it is possible to get Manticore, Mogdrogen, Huntress, and Leviathan