With release of new cards, I use an Offensive Jack on Master and it’s quite devastating. I got MVP 6 waves in a row on Master yesterday and I’d say use this only on Horde Frenzy as you never get Forges
Backstab
Hijacked enemies explode on contact
Hijacked enemies have more health
Hijacked enemies do Bleed damage
Zapper Upgrade.
Couple this build with the Cooldown Perk, it’s devastating. The Zapper Upgrade really speeds up the Cooldown when you zap enemies. I was getting Hijack every wave on Master difficulty with about Level 7 perk for Cooldown.
In regards to hijacked units, in my opinion, best units to target are Boomer Scion, Mulcher Scion or any unit with a Trishot or Rocket Launcher. Ignore Pouncers and DR1s with Overkill’s, not worth it.
Claw drones are devastating and I solo destroyed a Guardian with one. My highest damage on Wave 4 of Horde Frenzy was 2.3 million damage. Different way to play Jack and really fun in my opinion.