Thanks a lot for the feedback and sorry for the confusion, the game's still in development! I will eventually make it clear that this version still has limited content.
About the overkill mechanic: I'm not fully sure but I think you're talking about the Force Multiplier Aura together with a high attack value weapon... right? To re-use your weapon. Want to share what weapon(s) you were using? :)
Well no wonder, that's simply a really strong and efficient deck! :)
But I agree that this archetype is a bit too easy to build for the power output it has. I'm not 100% sure to nerf Force Multiplier just yet. The card is pretty hard to balance because it has a hard cut-off between doing nothing and doing something very powerful. And you managed to upgrade your weapons to a point where you meet the threshold very consistently.
I was already planning to nerf the Lance, because it currently scales just too well with upgrades and the diagonal attack option is a crazy powerful effect already. And it seems it was your main damage source in this case.
This is amazing feedback, thank you so much!