Can you share you build with us? Is it with 2H weapon?
What did you use your level up stat points for?
How do you do AoE damage when Savagery is single target only?
Sure, here is what I use and how.
It is a 2H build. The weapon I use now is the level 40 epic, Alvarick's Rebuke
http://grimdawn.wikia.com/wiki/Alvarick's_Rebuke
It is not the perfect weapon damage wise, as I saw some rares in shop with more dps but I like the stats on it, and the +1 all Shaman.
I used my points to max Brutal force, a passive that gives damage with 2h, and like 4 points in feral hunger that gives me 5 target 180 degree AOE, 25% chance on every hit, it also gives you like 30% of your damage as health back, and when you hit 4-5 mobs for 6k each, you get your life back to full instantly.
I got everything related to Savagery, as it gets more charges with more points, up to 8 at max investement. The other skills related to it give more Offense/Defense which is good for your To-Hit chance and Crit chance, I have 90-100% to hit chance on everything. The last one in this line, Storm Surge, gives both more phys damage, and attack speed which is very nice since you hit slow but hard with that weapon, and also a 20% chance to of shitload of electrocute damage. And the best thing about this skill line? The charges you get on Savagery seems to improve the related two skills too, so at 8 charges you get +115% to their efectiveness, which is a lot.
I also maxed Stormcaller's Pact for the added ligtning damage, more crit damage, 33% chance of +370% lightning damage, and the 25% phys to lightning conversion.
At the bottom, I put like 3 points in the aura, and two in the two related skills, mostly to get more benefits from the +1 all shaman skills. The aura is pretty nice, it gives health regen, energy regen (I have never used a single energy pot,), and the two additions to it give some resistances and +% health which is nice.
I also maxed the Shaman 50 points bar, for attributes and hp, and to get Stormcaller's pact.
From soldier:
I put 5 points into the bar, and maxed military conditioning for health, phys damage and flat physical damage, also put 1 point in Menhir's will, to get the nice instaheal at 30% hp and 1 point in fighting spirit to get it to activate 15% chance of being hit, it gives crit dmg, phys dmg, and +% offensive ability which is very nice because it boosts your crit rate. This skill has a long duration when it activates and thanks to it, I have it on in every fight basically.
For the AOE I also have the Lightning nova from Alvaric's Rebuke, 10% chance on every mine attack, and it hits for up to 600 dmg. And I have one Lodestone in my amulet that gives a lightning discharge on being hit, 20% chance, 200-450dmg.
As for the rest of the items, its mostly the epics I had in the stash, and I tried to get those with added lightning damage, and physical, the amulet that gives another +1 all Shaman Skills is also nice.
I also put this component, fang? That gives life leech in my weapon, so I leech 5% dmg on every attack.
The chest armor is the fanatic overcoat, nice stats, nice activated ability that boosts dps but activates rarely. I also have the Wildcaller cowl headgear because they look badass and have ok stats and can activate a regen skill when hit.
As for the gameplay, I will activate my Stormcaller's pact, and the aura, and run around smacking retards with Savagery that procs the AOE of Feral hunger and the nova and the lightning discharge, clears mobs pretty nicely, and you dont have to worry about the adds that Bosses spawn becaus they die to it without you getting distracted from whacking the bosses.
I will test the upheaveal skill. It says that it works with basic melee attacks when they crit, I wonder if that means Savagery or not. If yes, I will put some point into it, as I crit on a regular basis so it may give another AOE to my setup.
Edit: Upheaval seems to work with Savagery as an attack, so I will put some point into it just for another close range AOE and to get the benefit of the two +1 all shaman skills.