@thorny steeple in-game press G and type "armor shred". By default it subtracts 100 armor per stack and lasts 4 seconds. Increased armor shred chance applies extra stacks past 100%, so for example if you had a total of 250% armor shred chance, each hit would apply 2 stacks, with a 50% chance to apply 3.
@ionic lava If it's an offline character, they're stored locally so you could either recover it or just edit the save files to make a new character of the same level/items/etc, if it's online it's stored on the servers so likely won't be retrievable unless EHG re-enables family sharing (which is unlikely since it lead to a lot of RMT spam and botting)
@light bluff the best thing to do is go as far away from the origin of the echo web as you can, the further out the Orobyss node is, the more corruption it will give. Combine this with killing the boss repeatedly to stack up Gaze of Orobyss, which will also give increased corruption. If you do this you can easily get 50-100 corruption from a single orobyss kill.
@vernal phoenix They're constantly working on improving performance, have been since long before launch, and will continue to be. They're probably never going to completely 100% "fix" it, it'll just gradually get better over time as they optimize more and more stuff for more and more types of machines.
@dusky flower once you use the temporal sanctum to create a legendary, it no longer has LP, so you can't "reroll" it, it's locked with whatever affixes it got. If it bricked, you'll need to farm another of that unique with LP to try again