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…