I've only gotten to try Ubers a few times in RoS. I have one of each machine and some keys. I'd like to maybe get an accumulation of machines and team up and make a bunch of runs at Ubers as time permits here and there. My current Sader is super hardy on T6 and I think would do really well. If there were a few folks interested in joining up for this sometime I'd start farming some keys for the effort.