So far I've used La Junta, piranhas, Sentinel and Rescue.. I find the Rescue clan to be the weakest out of them all, La Junta is pretty strong.. The problem with Rescue their characters aren't really strong, who cares about the +12 boost and if you face soa your almost guaranteed to lose. Its like they threw a bunch of characters in there hoping just to balance it out like Glosh to help for soa and Kerry for courage, but when these characters don't hit they're pretty below avg characters and alot of times trust me they don't activate. How many times I had Kerry in my hand and I'm not the 1st to play or my opponent is playing a multi deck and had 1 character off that had no bonus, or when I play Glosh and my opponent had no soa..
Overall Rescue 6/10 for elo
Sounds like you just don't know how to play them.
The clan defiantly isn't a "6/10" - if it was, it wouldn't be considered one of the most annoying clans to face.
Take a look at the Elo ban list. Notice how Sledg is on there? Do you think he'd be banned if Rescue wasn't a good clan for Elo? Of course not - he's on there because people don't want to deal with facing them.
Rescue is not under balanced or over balanced. They have their weaknesses and strengths (Sob and soa being weaknesses and +12 attack being their strength ) It's all about if it fits with your play style. Sob would fit someone's style, where as attack manipulation might be yours. And you need to know how to pill