Mad idea, but what about say Construct region and you can choose Beasts?
Dragon region, you can use Divines. I dunno but maybe the opposing type or similar, rather than it’s goblins vs goblins or elementals vs each other.
Colour restriction blue - you can choose your colour?
At least that stops the same team vs exact same team.
Sure we have 6 coloured troops and weapons, but for example you could go with purple vs say red and counter with webs. Of course there’s wand but you can go with Inari as well.
Brown you can go with Zuul teams by going say red.
And give the player the choice - ‘choose a colour’ you choose red vs Geheron brown. Maybe there’s a bonus colour of the day or troop type that day for more VPs. Blood frenzy is poorly conceived as is.
It also differentiates from guild wars.