I actually have the 3:24:6 PB here, though I sadly didn't record that so I attempted to at least get diamond again on this recorded.
Done on v1.3.4

On which server was this done?
It's a private server a friend of mine hosts (using PebbleHost Premium plan) which is located in NA. My ping to that server is roughly 120ms.

Why is there a Niko Plush in the track?
There are actually a lot of these spread throughout the entire server, but it mostly appears only once or twice per track.

You don't seem to strafe a lot
yeah, I only do that on some key parts (right after CP 2, jumping from one to another End Rod in CP 4, a few spots in the Tower, a few times in CP 11 to avoid Guardians, a few times in CP 12 to maintain speed, and last mostly to avoid falling off in CP 15/16, fails sometimes too though)

Do you really have 3:24:6
yeah https://ria.s-ul.eu/8DoSdTaA.png
My friend's time is (by the time of writing) 3:38.5 so I beat their time twice by now hahh

What mods did you use while recording this?
Sodium, Tweakeroo (for Fullbright), Litematica, Illuminations
There are a few server sided mods solely for optimization (like Phosphor)

This run sucks
I know