Or if you have Tesla
Dwarven gate
Dwarven gate
Valkyrie
Tesla
Great attack team that can tackle almost every team (until Tesla dies)
This one is similar, but relies on skull spam, so gives you a different spin on the game:
Anointed One
Hellcat
Alch
Sunweaver (To Boost AO) or Courage (To boost and skull generate)
Primarily going to focus on looping, only cast Anointed One when there is a 4+ combo of green and red, otherwise you want reds falling to Alch.
Even cheaper are troops with the « Arcane » trait.
They get stronger the more you cast.
So take Alchemist + Hellcat:
You gain gold, and Hellcat throws damage.
But add Sister of Shadow, and her damage will increase the more you loop.
Good, cheap, slow Loop.
Here are underdogs worth using:
Frontliner: Ice Golem. Sturdy, self growing, passive freeze and some explosion.
Exploder: Poison Master, Azura, or Herdmaster
AoE damage: Setite Warrior. This guy can be really impressive and yet never used.
I think you should pick your kingdoms one by one and start to max out. Start with the magic kingdoms. Kingdomes give you bonus after you get them to level 10.
List from the kingdoms and their bonuses: Kingdoms - Gems of War Database
When i was level ~200 i had the same problem, the opponents trops in pvp where much stronger than mine, even if we had the same trop/team.