WHAT TO DO NOW?? IS IT TOO LATE? (maple story)?

so i'm a lvl 32 dual blader and i think i might have followed the wrong guide. up till now, i dont have a double stab or triple stab and i realised my slash storm requires some mastery book. so i want to ask is too late for me to go back and add sp to my double stab and triple stab? PLEASE HELP!