One Shot Everything in PoE 1's White and Yellow Maps while leveling through the atlas on league launch with flameblast trypanon marylene's fallacy ignite assassin. Check out the POB below where I tried to snapshot my character for several key points in the video.

This was all done during the Keepers of the Flame league launch for PoE 3.27 so it should be able to be replicated in the first week of future leagues.

Path Of Building Links:

NOTE I tried to snapshot all of the key upgrade moments and big one shot moments using loadouts, so you should be able to switch through the loadouts in PoB proper to see everything. For some reason the active gem often changes or disappears when switching loadouts though so be careful to make sure and select the right flameblast. I also had some issues with gems appearing multiple times in PoB. I just recently started trying to share PoB's so please have patience with me and feel free to make any suggestions in the comments on how to improve the shared PoBs!

Pobbin: https://pobb.in/Ovh7Y0zeiHut

PasteBin: https://pastebin.com/RWFR9v17