Looking for advice on High tier teams

That’s the basis of a pretty good team - pairing up exploders is always fun, and makes for a fast strategy. It can be risky though - exploders really reset the board, so you may line up 4/5s or skulls for the enemy - also in some games you want to deny the enemy a colour, and exploders lack the precision for that.

The other exploder pair is Ragnagord/Herdmaster, which is a bit weaker, but charges faster.

For blue, you could add Sunweaver or Druid for example.

For green, Hobgoblin is great, or even just a Goblin…