One of the main aspects of this game is that the further you get in it, the more likely you’ll be using mono colour teams or teams with multiple heroes of the same colour.
The weakness in that is that of course it makes 20% / 40%/ … up to 80% of tiles become useless.
But what if there was a type of heroes who learned to master their weakness and learned to control the opposite (weak) colour?
When their special triggers, not only do they get protection against their weak colour, but additionally handle tiles as if it were their own colour. This would just affect the damage done by tiles, not any other aspect of it.
In defence on contrast tiles of the weak colour would suffer a huge reduction in power against them when the special triggers. Opposite coloured heroes would also lose attack against these heroes.
Percentages and numbers I leave to the developers.
Ex. : an attacking team has 1 blue hero and 1 red “mindcontroller” hero. Whenever the red hero triggers the blue tiles do damage as if there were 2 blue heroes for a certain amount of rounds. The red hero becomes as well red as blue.
This would allow mono teams to still have some access to other coloured tiles, be it only from the weak opposite colour.