I use mono Uppers with Bob Joby and Gina Glitt. It's got me to 1400 ELO mutliple times.
Come at me what's your gull uppers deck ?
That decks good ComeAtMe, but pair that with Sak. You got everything, Globumm your 5* Phonos easy.
On a serious note, Mono Montana are still good. Junkz work well with a lot of decks like Uppers, Vortex Ghiest. This week i'd use Ghiest + Uppers since Levi's out. Roots + Uppers could counter them pretty easily too. You'll get the occasional FPC decks as well as the occasional Jungo i've seen so far.
To me, La Junta is the best. If they get a 3* SoB, then even better.
Otherwise, Vortex half deck works well for me too.
As HoAzeem states mono Montana are still effective they just need to be played differently. They no longer have the easy one two punch so you have to now choose your spots.
Uppers, Junkz, Huracan and (in weeks like this one) All- Stars can give me fits and I suggest trying on of those in a half deck with another clan.
I like to try different ideas every week. Most of them fail but that is part of the fun. My late week deck is usually a Fang Pi/Vortex deck. The Vortex bonus works well for and forces your opponent to think about when you will be coming in for the kill.
Right now I am using a Huracan/ulu watu deck. People r having a hard time w all my extra atk n life gain