Pick something and see it through for goodness sake!!
Beating Province Stages
The easiest way to get thru the Season 1 province is with colour stacking… The way this works is you choose 2-3 colours and ONLY bring heroes of that colour. Typically you pick the stacked colours based on the enemies you’ll face in that province
By stacking multiples of the same colour, it increases the effective “attack” stat in the damage calculation, which leads to tiles doing more damage.
Wu Kong is another great buffer of a hero as he makes the tile damage much much larger (I’ve linked a thread which explains why he’s so good).
For example, if we look at Province 21, Stage 6 you can see that there is a Yellow Mob, a Red Mob and a Green Boss. So for this stage, I would stack 2 Reds, 2 Blues and Wu Kong.
Some general hero levelling advice
The same applies for the 3-Star heroes…
Getting a good base of 3* heroes levelled will do the same thing as you work into the 4* hero range… Gives you colour options to make use of for colour stacks. Also increases your raid, Tournament and war readiness earlier.