I'm hanging around 1200 as I'm testing out a lot of decks and have limited time to play this week. It looks like Jungo can go that far though. You've got big enough power and attack manipulation to take on Rescue, but you've got the Stop cards or just printed power to take on the Roots, plus your clan bonus counters Yookie and Arno well.
I think though that the best decks this week appear to be Piranas, Roots, and Rescue. It looks like Rescue is getting hit hard by bans this coming week.
Nebukad, that's a pretty weak Piranas deck imo. Rhed, Trey, and Bloodh are all lesser variants fo their 3* counterparts.
I can't see Jungo doing that well, they've never really been a 1300e clan and the high amount of Roots (soa kills Jungo) and Rescue (their attack manipulation is very strong Vs Jungo) will hold them back no end.
I'm going to admit I was wrong Shadowcouncil. I took mono-Jungo out for a spin last night. I do not believe now that they will be a solid choice to get up past 1300. Perhaps a better player than I could do it, but you're correct, Rescue was just too much.
Jungo has a lot of power and attack manipulation. I thought it would be enough but sadly it was not. They also tend to have solid printed power and damage and a bonus that lets them work around Yookie and the other Roots DR choices. Sadly that made little difference either.
I can vouch that once you get past 1250, you're pretty much only seeing Rescue. I ran into a few non-Rescue decks, like Sarkhom half decks with random other stuff, but I'm seeing a lot more Rescue now than even Roots.
Piranas is probably your best choice to "meta" your way to the top.