Plan the teams so that there aren't competing barriers. If you have 3 players using Tenten/Mei then stack them all together in one field. Ideally they'd be able to burst one team down before round 2 even starts.

If you have someone using Tendo try pairing them up with a Fire main who uses the Shield. That way the Tendo is protected from debuffs and he's already immune to Interruption.

Change up your field placement every Saturday so you don't become predictable. Don't always go for 10 8 7, or 8 7 6, etc. Or alternatively, do something a few times in a row so you do become predictable, and then switch it up. If you usually do 10 8 7 try 7 6 5 3 so that they stack their strongest players in 10 8 and leave the lower fields weaker.

Don't put players using manual barriers together, like Sasuke with a Hashirama.

Make sure to have different sources of damage like poison and ignite. You might run into a team of Sailor Sakuras without any ignite on your side and end up timing out.

Focus down one team before moving onto others. A lot of times people will automatically target whichever ninja they think will use mystery first, but ideally you should just finish off the weakest teams as soon as possible. That's especially true for teams using healers or shields.

Take note of skills that affect the entire field instead of just each player's team. Lightning's Anbu Tactics, the various elemental shielders, the "type" buffers like Konan for Akatsuki and Bee for Jins. Stacking a field with 3 Bees and 3 Narutos will make sure they're extra strong.