I have gathered data on the number of enemies, and the number of nodes ( that is how many groups you have to kill ) for every map type, the enemies will be listed first and the nodes second, in the format E / N
Cup Heroes Enemy and Node Counts
wonder wood – 49 / 20
Wild West – 39 / 19
interstate – 47 / 21
village – 35 / 18
shipyard – 53 / 21
castle – 37 / 18
Egypt – 63 / 23
sea – 62 / 24
snow – 55 / 20
village 2 – 65 / 28
enigmatic land – 65 / 23
desert – 53 / 21
otherworld – 37 / 18
seaside – 61 / 24
Midnight Mountains – 55 / 20
volcano – 41 / 18
dungeon – 62 / 20
graveyard – 53 / 19
underworld – 65 / 22
from this, we can see the quickest map should be a village, as it makes you fight the least enemies and the least nodes
the slowest map is Village 2, as it has the most enemies and nodes
We can also see the previous idea that the sea and Egypt were tied for most enemies was false
this took me many hours, the results were gathered on easy mode for all maps, with the exception of wonder wood as the easy wonder wood has only 7 waves, normal difficulty wonder wood was used
I gathered the results through screen recordings to count out the numbers on a replay of the map, i did this in 4x speed via my phone video editing function