Grim haven map Extrem Lag

Hello,

so not sure how to replicate this but basically one map before the iron Citadel or rather the "Ezomyte City" Biome Map Grim Haven seems to have an issue with some mods and rain ambience. Basically i had a corrputed tier 15 map with ice ground and rain on the map i couldnt move an inch without lag spikes. I left the map and checked other maps to see if it was my connection but nope the other maps had no issues at all. I dont exactly remember what mods it had befor ei died. But here is a list that i remember what defintly was on the map.

-Chilled ground
-Boss on Map
-It was Raining on the map
-Monster were a bit mix with the blood flies and the blood ghouls that leave blood pools everywhere
-Map name Grimhaven
-Tier Map 15 corrupted
--My Character was Witch with 14 skelleton archers, 3 skelleteon warriors and 1 hellhound

This is all i can more or less give on information.