Code Vein- Easiest way to farm Haze, Mj310, Old World Materials and Pureblood (PC only)
The reason it's PC only is because you need to be able to spam click the invasion summon with a mouse, something console players cannot really do IMO. You can probably do this without the DLC by substituting the Lightning charge glitch with a bayonet backdash and hoarfrost/supernatural blood with cleansing light + blood sacrifice and some other darkmage gifts. However DLC makes this a lot faster. The location I used is Void District since the invasion spawn is close but you can do this in Zero district as well, although I think that one drops less MJ310 based on enemy spawns.
Here is basically the video used in the video. After using lightning charge to get back, I replaced it with Sands of Depravity. Before swapping blood codes to reset my max ichor count, I use Field of Thirst if possible to passively regenerate ichor while getting back to 30 max ichor. If you're close to level 30, go intensify your blood veil. If not, ignore intensification transformation. Do not fortify it since you will lose out on 10% dps from swift destruction.
https://sethclydesdale.github.io/code...
I regain most of my HP back through lifesteal passive whenever I cast my spells. Keep in mind this is on NG+6, so I can imagine it works on basically all difficulties except maybe level 1 NG+7 or something LOL. Use Revenant's Greed to increase item drop rates. Oh and also, you can invite other players to come farm with you too :)