Okay so I wanted to try to test out Grass Offence that was discussed quite a lot post Cinder/Magearna ban. I went with SD Kart and Rillaboom and paired them with Magnezone to remove Skarm/Corvi/Scizor etc. Now, i am looking for some solid glue mons that can also help with weaknesses of the core. Also, I am not sure about Kart being SD and especially if Zone should be Specs or Iron def for Ferro. Any help would be appreciated.
I too have been messing about with grass spam + zone since the ban and it has been treating me wonderfully. I've been running SD Boom with Choiced Kart (been trying both Band and Scarf, depending on my defensive core, they both work well) and Specs Mag. I haven't had issues with Ferro since I've been running fighting coverage on my Grasses.
As for defensive core, I've had great success with Blissey + Phys Def Pex + Flying type (Torn, Lando, Zap have all been great). Granted I'm not that high elo anymore (been a while since I've hit high 1900...), it's been treating me rather well in the 1500-1700 region. You can't cover EVERYTHING but this does a decent job of checking a chunk of the meta,
If anyone has any other input to share I'd be happy to hear, having a lot of fun with this type of team since the bans!