About Atlas (leveling up, dying etc) I explained everything exactly at
this post
The guy in the Dessert: No it wasn't luck manipulation. The guy is everytime in the same place, you only have to find the right oasis thats all. He gives me the 3rd strongest formula of the game "Sting" which is a must to equip/use in a normal walkthrough since it needs only cheap ingredients but in this run its not worth because the duration of it is a bit long.
The warp is nothing else than a dessert glitch, since the complete dessert is existing of different rooms which are connected to each other, and I just used the point where one room connects to another and only on this point the next room is wrong connected thats why I get warped to the wrong room near the entrance. The programmers missed this glitch to remove, I guess.