Fire and Water are my go-to when it comes to basics. Stormtrooper is definitely the best here, with Calamity and the other sparky.

https://splinterlands.com/battle/sl_e1eb3e971bdf0eb38f2be0d5ce6e7f4d?ref=beelzael

Fire with the Merc and the Conjurer are not far behind, though. Everything that usually deals damage to the own theam make a lot more sense in back to basics