What tension would you recommend?
Im a powerful player so I won't last a long time
This is one vague question that will lead to millions of answers drew. If i will to follow the above examples of tension, i can't play my normal offensive style of play since i strung all my rackets anywhere from 30 - 33 lbs. However, my stringing spec. also doesn't necessarily fits well with your style of play either because the "comfort zone" of your stringing spec. will always be unique only for you. If you stated your current tension maybe its more practical to guide, and since you stated that you're a "powerful player", i will just assume you are an offensive type of player. Whatever stringing spec, you have now, if its still doesn't blend with your style of play, just add anywhere 1-2 lbs higher ( X + 1/2 lbs, where x = your current tension) and give it a try.
lots of people say if you smash a lot you should either get a different string or lower the tension
Not necessarily drew. Lots of people can say anything but it's you at the end that need to identify your own ideal string type and tension spec. I'm a die hard BG 66 user since in the 80's until now and no doubt strung at > 30lbs with an offensive style of play, it wont last long with me ( ~ 1 week ). However, i'm happy and satisfied with it.