performance issues

Hi im having problem with massives fps drop, starting from 120 to 10 in town with to much players with skins with to many particles effects and running maps, not juiced, just alc go and the atlas tree the problem contents are ritual, expedition and some boss fights like The feared im asking if the problems its the setup i have ( im gonna detail what i have) and what can i do besides buy more expensive hardware. Thank you for your time and stay safe

PC Specs

_Processor: Intel(R) Core(TM) i7-8700 CPU @ 3.20GHz (12 CPUs), ~3.2GHz
_Memory: 16384MB RAM
_Available OS Memory: 16318MB RAM
_Card name: AMD Radeon RX 580 2048SP

In game config

_MODE: Windowed Fullscreen
_render resolution: 56% 1060 X 600
_Renderer: Default
_Vsync: Off
_triple buffering: default
_ Fps caps default

Detail Settings
_Antialising Quality: Default
_Upscale Mode: Default
_Sharpness: 0%
_lighting: Default
_Shadow Quality: Default
_Sun Quality: Default
_Number of lights: low
_Bloom: 25%
_Deph of Field: Default
_Water Detail level : Low
_Texture Quality: Medium
_Texture filtering: 16x Anisotropic Filtering


Waiting for your response, stay safe