PoE builds similar to Delayed Impending Doom (Doom blast) build - Path of Exile (3.17 Archnemesis)

I'm interested in a Cane of Kulemak build and I was considering an Impending Doom build. The problem is you need doom to tick to maximum and afterward, your curse needs to expire. I was thinking of running the Kulemak Chaos staff with +3 supported and 14% Qual of support gems to get a high level Enhance and Empower on a skill and immediately thought of Impending Doom. ~~The Doom tick rate with this setup would be: Anomalous Enfeeble(there's also Punishment but that's not as useful) which has 40% doom increased rate at 20%, with Enhance it becomes 142% increased doom rate. 150% doom rat

On ssf standard. Wondering if i should create a build around both of these or drop one. Most people I saw on ninja were only running one or the other. If I run both i am thinking about putting an aura set up in staff for lvl 7 enlighten. With both I hit dot cap rather easily, but I might struggle with defences a bit. I want this to be a bosser. So mainly wondering how i fit in more defence. Main things i can think of is purity watchers eye and progenesis. POB (Just something I threw together quickly, needs a few more things) &x200B;

POB: I've sunk a good chunk of change into my Impending Doom PF and finally was able to beat the pinnacle bosses but not with out a struggle (mostly mechanics and dot's). I want to try and make a push for Ubers but clearly right now I dont have the required DPS but I am stuck on how to get there. I've seen steelmage melt Ubers.. is it only possible with god tier gear? Any help or advice would be appreciated. Thanks!