Just search the public presets for clan1: rescue, clan2: rescue, and set deck format to elo.
Then sort by popularity
If no one's banned, and SOB isn't too much of a problem, this is what I like to use:
Cliff in Elo xd
it has lots of damage, even 2hko options, and 2 SOA, 2 SOB, 2DR, a +life and a stop.
If you're running into high natural power, or a lot of SOB, then you really should have sledge in for cliff
(Some people would argue for sledge anyway, he's more stable, but it's a personal preference. I like the soa and the 2hko options he opens up)
Kerry is often banned. In that case, I often use Ghoub, but most 4 stars in the clan are a reasonable substitute, or do a different split, and put in anita and joanna for krash and Kerry (when banned)
A deck with only 1 7 powered card will get you crushed in ELO as you will not be able to compete against SOB and even in high pill fights in general. I would say anita for slyde and sledg or even aurora for cliff. rescue are not the best clan for 2hkos because it is hard to dump a lot of pills on a card and win when it only has 6 power.
Kinda depends on the meta. Some weeks having SOA is better than 1 extra power. And it's as much about the 2hko threat as the actual 2hko. The 2 DRs mesh well with Cliff. And if you hit with the right cards, you typically only need to hit twice, or even a furious 1-hit in some matchups. And it's almost hard to not get in 2 hits with rescue.
But you're right. Against very high powered decks, or lots of power manipulation, that deck can get into trouble.
I've got a deck for Survivor Elo atm. I use it for dm's (Other than Marco duh..)
Elvira And Lea (Soa And Sob)
Anita And Krash is life
Sledg Or Hax as a 5* Glosh Kerry (Suzie Or Benson)
And I lke Steve.
So there you got a weak dr that's a weakness but 7 powered cards here. Glosh is a beast . Try not to go for 2h ko's When Rescue win 3 rounds they've won the game so try 3 rounds for a win 1 pillz is very effective