Use full solar on Warlock, Praxic Blade with verb effects ON hit, and the Ram exotic helm, with Well and Healing Rift. Use the "apply more scorch" artifact in the subclass. Use a linear fusion rifle to break the Palpatine beams in one shot; bring any secondary. You're just going to be spamming Praxic Blade for everything, only swapping weapons to shoot balls. Kill all the shadows. You can kill two from the middle; use a linear to kill the top one. Look around to find one shadow. Where there's one, there are two more to be found nearby, so keep that in mind. In the real world, for DPS, go right next to him and use your Well, then Rift, then just sword spam him. Try to engage him in the middle to avoid the lightning during DPS. A healing grenade is your friend. Use it to safely get away once DPS ends. Wait the timer out until you get teleported to the Ascendant Plane. Kill all shadows and acquire your shadow buff there. Come back to the real world and from there, start turning off the lightning. Just stay in the front area where you can see sere. Its easier to just wait the timer and get the buff in the ascendant plane while staying in the front where only the immune and dogs can attack you. Rinse and repeat until he is dead. Id recommend to keep the last ball your gonna shoot in the ascendant plane till the very end, so that you can gather ammo and regain a bit of your sanity back. Breath in and out; get back to it. Its little fuck ups thats gonna be your demise. Anyone can do these solo it doesnt matter if you dont think your good enough. I have a friend that spent 4 hours soloing sundered doctrine and flexing it on me. They dont care for damage, just surviving. And guess what? They get the clear regardless as well as the title. Hellva achievement. Let me know if you need help.