I know this sorta thing is obvious, but for those newbies who don't know I'm going to explain which clan rivals which.
Now the most obvious is All Stars, they were created to rival Bangers and Ulu Watu, since their bonus cancels both those clans bonuses out.
Then there's Jungo, they were given the life bonus to rival the Freaks and their poison bonus
Next there's Pussycats, they nullify Fang Pi Clang and La Junta
Nightmare and Piranas both cancel each other out, but you can also look at Skeelz and say that their bonus makes both those clans a little bit less of a threat
But Skeelz exist to rival GHEIST and Roots.
Montana's bonus kills Rescue, as does Uppers, just not completly.
Sakrohm kills the Sentinel and Junkz bonus
The only clan that has no definitive rival as of yet is the new clan Vortex, The only way this clan can be rivaled is if a clan is made that is the total opposite of Vortex. In other words: -2 opp pillz out of 3. That bonus would completely nullify the Vortex bonus
The reason why I made this topic is to make a small point, every clan is made for certain reasons, to combat certain clans, bonus wise, I feel that the Uppers clan isnt AS combated as Montana is with Rescue, seeing as how Rescue can still get 2 attack from their bonus, so i think a clan with a +10 attack bonus would even things out a bit more, yes this would mean the characters in the clan would have to be low in power and possibly in damage for some cases, but still, it wouldn't be over powered, Vortex will receive a rival clan eventually, that much is certain, UR wouldn't make a clan like Vortex without any plans to make a rival bonus