Getting a 5 star rating is quite simple. All you have to do is give the crowd a good fight. for example, when you go for a pin, manually stop it as the refs hand is going for 3, that will make the crowd go, "oohhh"
and the announcers may say something. Also, use every move you know how to do. When you think it is time to pin the person, remember, you could make him bloody, keep on attacking him.
Now for buried alive matches. First try to bloody him but make sure YOU dont get bloodied! Do not give him time to recover and make his whole body red. Also, use weapons from under the ring. Try to bury them after a high impact move.
Hope this helps, plz make this your best answer.