Searching for old threads effectively

[Voss]

I've had no luck in trying to search for the old DR's Q&A and the one mafia thread where everyone rated the roles in terms of power.

Have they been deleted?

[Slaol]

http://www.sc2mafia.com/forum/showthread.php/22650-What-do-you-feel-is-the-strongest-role?p=368119&viewfull=1#post368119

This might be the strongest role one that you mean. You want a key word that is in the title/regularly in the post.