Some counters spells against water/air would be good for Machaka.
With fire + nature a mage should be able to make the day sunny ("sunny weather", fire/nature BE, replace rain/storm by normal weather, add 1 heat). Instead of simple flaming arrow a fire mage should be able to burn arrows including ennemy ones ("arrow combustion" BE : each normal arrow has 30% chance to be burned before hitting, each flaming arrow has 60%). An earth spell should even be able to summon a creature that is not only shock immune but a lightning conductor ("iron golem with an antenna"
, earth summon, shock immune, 50% to catch any lightning spell if at range).
Then counter to counter to counter spells can be imagined ("frozen arrows", water BE : your arrows have a chance for a numbness effect + are immune to arrow combustion ; "thick clouds", air BE : the sun can't be seen today, double the cost of "sunny weather" and all spells with sun in the title or increasing heat ; "wet ground" : any lightning affecting a shock immune creature like the famous "iron golem with an an antenna" does AN dammage to all creatures close).
But of course, if designed by me this game would have 8412 spells including 6212 useless ones due to the 2200 last counters.