Riot is the worst clan imo. They have extremely low damage without Pericles. Only reason I use a half deck Riot is because of Argos.
I think Vortex is simply a better version of Riot with Dagg Cyb Lhia Dagg and Gats 11* half deck. People are talking about SOA but I don't care because I use them for the defeat +1 pill anyway
Frozen is probably the most broken and overpowered clan in ELO. They are unstoppable if you don't have SOB but surprisingly they are very good against SOB clans with Haaken, Aaron, Stompah, Tiwi Ld and Lowki
It's not surprisingly, Frozn has some cards with the highest base power in the game.
Meanwhile, there's only 2 SOB clans. Piranas have low powers, but slight pill manipulation to try to make up for that.
As for Nightmare, low power, but high damage. A good number of their cards are low powered nukes.
It's pretty ridiculous how Frozn has a 9 power card, while Bangers still are stuck with a 7 power base maximum.