Personally I prefer the Red War Six take on the logo. That is what I was planning on using in the past. It is 1) a clever take on the club name, 2) makes it obvious the logo is on the SIX face as opposed to the one.
Star Wars Legion - Rebels
Guildball - Alchemists
Blood Bowl - Lizardmen
Guildball - Alchemists
Blood Bowl - Lizardmen