1v1 Tournament Ideas? Or a 2v2?

Hi guys. Most of you know me or knew me on d2pk as Lockzilla. Well Im Wayne. I was always hosting tournaments back in the day on old d2pk servers. I now want to help Anni be a little more active. Once d2pk becomes more active, I will do tournaments on that, but as of right now. Anni is the only really active server. So I need some input. What do you guys think would be good? I would like to host a 1v1 tournament very soon. I need to know what items/skills would be allowed via GM (Good Manner) Duels. What items/skills are just to OP to duel against.

2 vs 2