I'm not really sure how much that would help. If we're the #5 seed, we'd play the winner of the #12/13 game, which is looking like it would be Kentucky, Missouri, or Georgia, whose current NET ratings are #144, #78, and #96. I guess there's potential there to give us another top-100 win, which I think is something the committee looks at (record against top-25, top-50, and top-100 teams). Our current record against the top 100 is 9-9, so if we win 2 out of the next 3, we finish 11-10 against the top 100, and of course if we lose 2 of the next 3, it's 10-11, so I guess an extra top 100 win would at least give us a neutral, instead of a losing, record.
A blow-out win in the SEC tournament would also boost our NET rating, but that seems unlikely as 1) these lower seeds always seem to play like they have nothing to lose (as they don't) and 2) even if we got a big lead, I'm sure we'd rest our starters to be fresh with the potential for back-to-back-to-back-to-back games.