As to bubbrubb's response:

People uses torches as stated b4 because when u torch the nut (not the stud) then the metal expands and creates more room for the stud to have room and there will be enough clearance to spin off the nut.

as for the money i would buy the nut splitter because it is only $15 and then you will be able to see if the threads on the strut mount is damaged. it will prob be the least time consuming also.