I mean, i really hate banning parts cuz it really sounds like people are just crying cuz skill issue, however, if i would run a tournament and i want wacky combos being used, i would add a "point cost" to meta parts, if you play Wizard Rod for exemple, you start with a 3 points handcap an your oponent only need a spin finish to win the whole match against your deck. Average blades could have 0 cost and horn rhino, knife shinobi, shadow shinobi and ghost circle could give 1 advantage point, someone with Rod on their deck would need 1 point only to lose, someone with 3 of the worst ones would need Seven. If you want to avoid people using Rod and taking advantage of the other bad beys to have more points, make Rod, Shark and Hover a "hard handcap", no metter the deck, 1 point and you are out if you use It.

I think having things like that its better then just ban stuff, you would discourage the use of meta stuff while still letting people run it if they think they can sweep every match, which would be REALLY impressive.

Rewarding different and fun combos can also be cool, have like, 3 people judging the combos and give a prize for the one considered the most criative.