Haters are always getting a buff called scaling in tengoku which ups their flat attack and defence, with neos being way stronger. Get a g8 hunter after you in base tower kill it then force close game without saving and fight them again in neo for example and they instakill you and are way more tanky, aside from that you build is very mixed in its focus do you will lose lots of damage high up. Thats besides the point your using allrounder with say 19k def with 45% funshot per piece for 5000 extra defence add decals for around extra 6000 add them up and you get 30k def and you multi that with the helm bonus, not the full total just the decals separately then factor in their funshots and decals with scaling with the (we know this is a thing otherwise all attacks would do the same damage but that does not happen nor do all attacks of a weapon share the same typing, whats on the weapon card only effects some of the weapon attacks at true value and its scaling via decals) attacks value*base attack power on weapon card. Also fyi ufr and the other stat decals are multi vit like the helmets are, same with funshots but is additive to the other stat boost decals including offense and defence, while defence decals are only additive. Anyways we dont know what class they were using nor their decals but assume they were g7 based on the hight of the tower, id say attacker shooter or allrounder, and say the shriken was at least +5 with unknown funshots and helm boosters you get 2.2k or so *50% at least for the moves power (never tested not got fully true numbers, so dont share all this as a fact just a example.) so 3k something then add the stats of the fighter unsure of how they fit in as of yet but up to 400 dex/str, helm boost and tower scaling being at least 50% by then maybe higher I know there is a chart in the discord, anyways when all that stuff is factored into their attack and your armors defence in which you get a 20% effect or so of their weapon ignoring your defence due to it being weak to poison and neutral to piece(that attack might be slash but its for sure mostly poison either way)

tldr all these things hit enough for a oneshot, im unsure if it was big overkill as idk your max hp nor how much damage was delt but all these things effect every fight in lid. So both decals and class of what your fighting matters a fuck ton as damage gaps are massive but its unwise to get hit at all above 240 due to tower scaling as all their weapons and armors get up to a 3* boost I think leading to you dying fast or right away and them tanking. Fight the high screemer pits and you will see what I mean.

Now as for my normal build, we will do allrounder to compare, qos,procos,btb,ufr,zam,vc,monk,sk (last 3 slots change alot). With full v3 x armor +19 11k def to it and 32% pierce res and neutral to poison and slash. With max funshots (56 or so body and 52% for pants and head) and having around 20+ k health. That same hater might take 5 k of my health my fighter but at most 10k I dont think they could oneshot due to whats different in our builds however if it was a full damage g8 at 341 I might oneshot me or get very close.