I have posted about this in the past in https://discord.com/channels/314103695568666625/1223033855037145270 but since then I made a mod to reproduce this behaviour and it is clear that this reduces the amount of lag significantly. I have tested it with multiple other pvp players which have really enjoyed the mod so far.
I know that this is emersion breaking but Id say that the performance is more important here.
The mod: https://steamcommunity.com/sharedfiles/filedetails/?id=3291877175
Its literally just this this piece of code:
Actions
[
{
Action = Replace
Replace = "<modes/pvp/pvp_arena/pvp_arena.rules>/Mode/JunkDamageFractionPerTick"
With = 1
}
{
Action = Replace
Replace = "<modes/pvp/pvp_arena/pvp_arena.rules>/Mode/JunkDamageChancePerTick"
With = 1
}
]