I used to use 8-12lb tippet myself and eventually worked my way up to 16-30lb flouro so I could muscle fish in quickly. Originally the thought process was : Light tippets are more gentlemanly and sporting. Now I think of all the times I saw a striper or big trout go belly up because I played the thing to death on light tippet.
Now my mentality seems to be : get it in, get it off and get back in the action. Some of my buddies laugh at me when I hook up because I use every inch of graphite right down to the real seat to get my fish in quick. I give not a thought about the rod and what it can take. I figure that its warranteed so if it breaks..... Post Office here I come. I can't remember the last time I truely tired a fish out. Usually I'm standing there telling our finned friend in a low voice " Calm down! I'm gonna let you go ". Although I found my fish fighting technique to be a problem with the Bluefish. I think I need to tire them out more. The scar on my knee from a 7lb'er reminds me all the time.:hehe:
I have found in all honesty that RARELY does tippet size make a difference in Striper or Bluefish fishing. So why not go heavier? If you are catching schoolies it lets you release them faster and stresses them less giving them a better chance at survival, plus if you do hook into a HOG you have the piece of mind that barring a freak accident you will more than likely get that fish of the year or of a lifetime to the beach.