VR Doom II - Map21 Nirvana - QuestZDoom

Second attempt. I ran out of ammo on my first try, and got killed with only one enemy left. I tried to get some infighting going at the end to account for the ammo shortage, without much success.
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I'm attempting to beat Doom II on the Meta Quest 2 (virtual reality headset), played through QuestZDoom on the Ultra Violence difficulty.

Again, I'm going for 100% kills and 100% secrets; all maps from a pistol start; no jumping, crouching, or mid-level saves.

Mods: Alternative Vanilla 3D Weapons (except chainsaw & SSG from HDVRweapons_Quest_Plus_v1.0; and rocket launcher & plasma rifle from alek_DoomGuns_v1.1a); Customized MIDI soundfont (using Merlin, Chorium, Roland, and self-made samples).

Duplicate music tracks were replaced with the ones from the community-made "MID the way Id did" pack. https://tinyurl.com/4jhth4m9