45 50. Thanks for the carry, Bor!
Solo I haven't tried above 25. I did it for the achievement and didn't bother using a stone to try higher. 25 was not bad so I know I can do higher, but I play to play with friends primarily so want to save my grift keys for then. And we always do higher in groups since pretty much everyone is better geared, higher paragon, and a better player than me.