I assume there is some sort of formula that calculates the creature's health based on the wave you a currently on. Each creature would presumably have a starting health value at wave 1 and it would increase as the waves increase. For example, (starting health * wave number). I imagine the actual formula would be more complicated than this.
Does anyone know what this formula is and if it is accurate for each creature type? I would be interested to know for each creature as it may be different. This would include the Domestikion, Hoodinion, Mearidion, Murmillion, and Scissorion. If we can check the creature health over the first few waves the formula could possibly be determined.