Learning Boss Mechanics while being safe

For those of you who have never gotten around to actually engage with the 'new' bosses and learn their attack patterns to not use all six portals in 45 seconds I bring to you this build. It will be significantly weaker in League as I'm using Eternal Damnation, though my defences are a bit overkill. In my current setup I'm able to (BARELY) tank a max rolled EoW nuke WITHOUT guard skills or fortify up, according to PoB. If PoEdb is correct that ability has like 235,000 damage being half cold and lightning each. The other Legacy items can be replaced with just a bit more investment. The Loreweave gives me 2 max res, which could be made up for with better armour and the legacy taste of hate can be replaced with better phys taken as x rolls on the dawnbreaker, the helmet or just two phys as x rolls on your watcher's eye. The build isn't complete which can be seen by the 'placeholder' items, most of them with 2 to 4 open affixes. The damage could be increased by swapping Combustion to Empower 4 or 5 in the Fire Trap setup but since Empower 4 is only like 150k dps more I opted to just run Combustion for the time being. I use RF for some additional damage and better clear, that's why I chose Woke inc AoE. On bosses you could swap to Conc effect for a couple hundred thousand dps. I hope some of you can make some use out of this build.

Current PoB: https://pobb.in/fpYaBxkDbI8b