What is the minimum level one can feasibly reach the 3rd challenge chamber in Nier's DLC?

Question

What is the minimum level one can feasibly reach the 3rd "World of the Recycled Vessel" challenge chamber in Nier? I ask because the 3rd chamber of the DLC is supposed to have enemies that have a higher drop rate of Titanium Alloy than the robots in the Junk Heap.

At the time of asking, I am around level 13 and die in 2 hits in the first challenge chamber.

Answer 1

• The 1st Door can be cleared right after starting part 2 of the game when you are in your low 20s. It seems the key is to have a strong weapon from that part of the game.
• The 2nd Door will kill you in 1 or 2 hits in the first chamber at that level. It can be cleared easily in the mid-20s.
• The 3rd Door can be cleared in the late 20s with a suitably upgraded weapon. Just be careful of the 3rd boss on the bridge, it can kill in 1 hit!