Wave
Enemy Balance level
Wave skip level Calculated wave skips. Change if you have WS+ or a different value:
Your total enemy count
Tier
Intro sprint waves
WA Mastery level (-1 for not unlocked/card not equiped)




More information on reddit: https://www.reddit.com/r/TheTowerGame/comments/1huyrn3/number_of_enemy_spawns_losses/