All difficulities(gamma,beta and alpha) all have this boss at 100.000 hp which means alpha and gamma is the same hp but it just has harder gameplay.(less time,more minions etc.). You have to fight the boss with a tek spear too if you didnt know already

Learned this the hard way, the tek spears do friendly fire so if theres multiple of you attack her one at a time, i did this with 2 others and they both died to friendly fire in just a few swings so i was left solo, be careful it can 2 swing kill your friends

When she points a single scythe at a player use the deflect with the tek spear or the attack will do loads of damage and sometimes one shot you even at 1000 hp on your player.