Fast-Track Like?

Hi guys

My question is that i found my target ports and ip and OS etc. via nmap but after that how do you find and use the right exploit for system. I found that in backtrack 5 there was a tool called Fast Track that tries exploits on victims system but in kali linux fast track added to SET and they say that its not usefull as before so my question is is there a better tool for kali linux like fast track or you need to do a vulnerability scan and find out yourself . I know i am being lazy and noob by asking this but I have been trying to find answer for my question for long time on internet yet still i couldnt find anything satisfying.

thank you for your answers