Tale of Two Kings: The Duke

I am no veteran at this game, but I came across something that was mind numbingly difficult for me to counter.
In a match, I stole a Tycoon that a Resigny was about to gift to a bordering opponent using a nearby Pirate. He declared he was going to eventually have two kings and I best prepare for war or give the tycoon back.
I tried to rally people up against him, but it seemed we needed the commitment of every one if we were to beat him down. A few on his border allied with him to ride on his back to a silver and bronze, and needless to say I was pummeled to death- with ever 3 drillers accumulating to 5, 30 to 50 and 90 to 145 and so on. I felt helpless.
I realize this is very circumstantial, and I probably lacked the skill or right specialist to counter him, but what do you think about this?
The king sacrifices the shields for a large damage boost, but a second king sacrifices nearly nothing for an identical damage boost.
Should there only be able one King, similar to a Queen?
I have some Ideas for a secondary class, that a hypnotist could upgrade into instead of a King-
Duke
Local: For every 3 (2?4?) drillers owned locally after specialist phase destroy 1 enemy driller in combat.
+10 Maximum Shield Charge
(looking for something that more on the front lines and more vulnerable but doesnt become totally different from a king)
In a match, I stole a Tycoon that a Resigny was about to gift to a bordering opponent using a nearby Pirate. He declared he was going to eventually have two kings and I best prepare for war or give the tycoon back.
I tried to rally people up against him, but it seemed we needed the commitment of every one if we were to beat him down. A few on his border allied with him to ride on his back to a silver and bronze, and needless to say I was pummeled to death- with ever 3 drillers accumulating to 5, 30 to 50 and 90 to 145 and so on. I felt helpless.
I realize this is very circumstantial, and I probably lacked the skill or right specialist to counter him, but what do you think about this?
The king sacrifices the shields for a large damage boost, but a second king sacrifices nearly nothing for an identical damage boost.
Should there only be able one King, similar to a Queen?
I have some Ideas for a secondary class, that a hypnotist could upgrade into instead of a King-
Duke
Local: For every 3 (2?4?) drillers owned locally after specialist phase destroy 1 enemy driller in combat.
+10 Maximum Shield Charge
(looking for something that more on the front lines and more vulnerable but doesnt become totally different from a king)