I want to build a lighting gemling mercenary

Ball lightning + lightning warp (with magnified area and persistence to prolongue shocked ground) really works well as sources of shock, much better that voltaxic grenade. I even switched to just this combo and shock burst rounds for clear. Bosses melt also - finishing act 6 right now

A bit clunky gameplay since we are teleporting to ball projectiles and usually that means that you go right inside mob pack, and tight areas are harder since as the ball hits wall it disssapears. Maybe slower projectiles will help in these areas, however in open locations they slow you down.
Didn’t find any better sources of guaranteed shock for now

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Raigkit#7001 wrote:

For shockburst rounds what skill gems are you using? I cannot find any called Shock Ground

For galvanic shards I am using lighting infusion and Pierce.

In the first post I added a link to a video in which a showcase the gems and test the dmg

I'm only in A3 but I've been using Voltaic Mark on an enemy that's ready to cull, then lightning warp to kill. The nova has 200% chance to generate shock, so I support that with an increased AoE gem.

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Effects
Mark:
・Limit 1 Marked target
・Mark Duration 8 secs
・Hits against Marked enemy have 50% more Shock chance
・Shock has 30% increased effect on Marked enemy
Nova:
・Attack Damage: 271%
・3-57 base Lightning Damage
・+8% Critical Hit Chance
・200% Shock chance
・Nova radius 2.6 metres