no he always been -1 on x4 and more gems, i know another troop , i think it’s famine who does -3 on x4 gems so maybe both together would be a good team
edit : it’s not famine but i remember another troops doing this , famine third trait remove -2 skills points on every turn to first troops, it’s also nice
Not a trendy team but i am having huge success with
Luther
Mercy
Infernal king
Valkyre
Offense is easy, defense is running about fifty percent
Try this later
my 2 main teams never have problems ever:
jarl firemantle
goblin rocket
wight
stalker
I use
Knight coronet ***
Druid**
Valkyria***
Soothsayer***
About 98% win rate 
I use
The Great Maw***
Bone Dragon or Infernal King
Mercy***
Valkyrie***
Valkyrie is only there for soul farm, if you don’t need souls replace with Sheggra or Jarl and use IK.
Both very very efficient honestly, i would say a 98% and usually very quickly.
Gorgotha(tank)
Valkyrie(blue creator)
Crimson bat(16 true to all)
Crimson bat(16 true to all)
full kingdom stats/fully traited, bats do 16 true to entire enemy.
UPDATED*
fully traited and full kingdom stats, morthani scythe does 25! damage to entire enemy team. wipe em out.