So I like that we now actually discuss this topic.
I like the mixed system that OP suggests as well as your idea Jordan, so that placing from like 1st to 3rd on the crystal can give you special rewards/tokens/ whatever.
About your last suggestion though, i don't know what to think about it honestly. I can only talk for myself here obviously, but Guild Arena didn't matter at all in my perspective. I can't even remember someone taking it that seriously (maybe just my view, could have been important for some guilds though).
Therefore I'm not a big fan of just another 1vs1 Guild-Match-System. I think a TW with rewards that are a bit more emphasizing to participate could already be enough.
