I've been using Felwinter's prismatic slide 'lock for most of the expansion, it's been working reasonably well, the self-healing has kept me alive most of the time, but now I'm trying to move on to Master level and I'm not sure if Felwinter's is going to cut it. I'm LL 263, so maybe my level is just too low, but I could barely clear the first room in Salt Mines with Felwinter's, and then I died my last death in the second room. Part of getting good is using the right loadout, so maybe it's just that I haven't brought the right gear. What Warlock builds are working for you at Master and higher difficulty? If you're using Felwinter's, what weapons are you pairing it with? FWIW, I'm pretty fond of Sunbracers, Osmiomancy, Mataiodoxia, and Swarmers, so those would be my first choices if any of them are especially viable. I never got the hang of Starfire, I've given it a shot with poor results, but maybe I can learn. Thanks in advance for any advice you can offer!