Initially I was going to do Volcanic Fissure, but everything about Earthshatter just feels better. Still a lot of expensive upgrades to make, but for the most part the build is there, prolly play around some more, maybe the tree can be different if you get a keystone relic.
PoB for anyone interested, that's my current gear from the video.
Life
6035
Mana
103
Energy Shield
76
DPS
3M
Effective Hit Pool
234.74K
Chaos Res
72
Fire Res
77
Cold Res
76
Lightning Res
76
Armour
85K
Evasion
28
Block
0 | 0
Crit Chance
0%
Crit Multi
0%
Rage
25
Strength
1718
Intelligence
195
Dexterity
227
Ward
0
Item Quantity
0%
Item Rarity
13%
Movement Speed
185%