I don't know if its my grid or not, but I can't solo NM90 in a timely manner and I've been experimenting on different setups with/without Korwa/Zooey. It takes me 10 minutes to solo while I've been reading people do it for as low as 2mins. How?!
Grid would be, 3x claws, 1x gw dagger, 1x gisla, 1x cortana, 1x kirin sword, baha, 1x kirin bow, 1x pendant dagger
I basically just pop everything in the beginning, tag team and skip ougi/attack.