Question about installing shocks

Hey Guys

whats the best way to get the nut off that holds the shock and spring assembly together.

getting ready to install my tokico illuminas this weekend and remembered that to get them off the first time (when i installed the coilovers) i had to use an air wrench on the top nut to pop the spring and shock assembly apart, but dont have access to an air wrench anymore...

please tell me their is a way to get it off without an air wrench, cause i dont want to pay the 350 to 400 dollars the shops charge around here to do it when i know i can do it my self

thanks
chris