Nerf Nathan and Nerf Cyborg Kenny
For me these are the two worst cards in the game to fight against. I'm OK fighting all other cards even some of the big ones people complain about.
The problem with Nathan is he does good damage, has huge AOE, and knocks back enemies and has a insanely long attack range. Most of my losses were against Nathan abusers who abuse his range and shield him by throwing any unit they can in front of him.
The proper nerf for Nathan should target his range, he shouldn't out range tower defender but he does and can be out of range bombing away. Take away some of that range and then he will be in a decent position.
Cyborg Kenny is annoying and has a long control duration on any unit he controls. In fact he's actually bugged... If he can control tower defender before tower defender death wish. The spawning crusader will now totally be the enemy new kids unit... That is not right and needs to be fixed. If crusader spawns, the duration of the control should either stop or be continuous from the duration of tower defenders control seconds. For example if it's 5 seconds control, if 4 seconds are tower defender and it spawns a crusader then that 1 second should count as the same part of the duration and end the control duration.
Honestly fix this buggy crap.
Also nerf that control timer, he has a longer control duration than mecha timmy and the control spell card. It's just broken. Fix the bug with tower defender interaction, also not to mention I have seen it actually spawn 3-4 tower defenders.....