We just released new sliders underneath "Attack" and "Power Attack" buttons that increase the amount of stamina to use which effectively just combines X attacks into 1, so if you have the attributes to take down the boss you can choose your stamina spend more wisely. Right now you can use 1-4 Stamina for a regular attack or 5, 10, 15 or 20 for a Power Attack. If you don't currently have the max available for a Power Attack (20) that means that you need to increase your max stamina to have that option. Changes will be made based on data collected and feedback! We hope that this change will make the game more enjoyable.