I have been setting up a new modded install over the course of several days now, trying to be as careful as I can and doing incremental ingame testing for every few mods I add. Now I notice while wandering the exterior worldspace that sometimes my FPS goes into the single digits while the camera is facing a specific direction. It seems to be triggered after wandering a certain amount of distance. It's also very inconsistent. For example if I save near an area where I have this problem, then load the game again and look in the problematic direction it's suddenly all smooth again. This makes it much harder to properly troubleshoot. I have found one area though where I can consistently reproduce these framerate drops, and that's facing Half Moon Mill from the south.
I figure this problem must be related to either landscape or LoD. My uGrids are the default value so I doubt that's the problem. I haven't installed any landscape texture mods either so far. I've only used Verdant Grass and Simply Bigger Trees, and I've tried disabling both of those. I have also tried disabling Enhanced Lights and FX which also introduces exterior edits, and finally even Climates of Tamriel just to be sure. Disabling all of these together helps a bit, but the bulk of the issue persists. I have tried retracing my steps with regards to mod installs but so far the root of the problem still eludes me. I have an ENB active, but ticking off UseEffect doesn't alleviate the issue either.
This is my load order:
Update.esm
Dawnguard.esm
HearthFires.esm
Dragonborn.esm
Wyrmstooth.esp
ApachiiHair.esm
Unofficial Skyrim Legendary Edition Patch.esp
ClimatesOfTamriel.esm
MolagBalsInferno.esm
HighResTexturePack01.esp
HighResTexturePack02.esp
HighResTexturePack03.esp
Cutting Room Floor.esp
ABT - Faster Bolts Improved +50%.esp
AmazingFollowerTweaks.esp
Brawl Bugs CE.esp
ClimatesOfTamriel-Nights-Level-2.esp
RaceMenuPlugin.esp
SkyUI.esp
DSerArcheryGameplayOverhaul.esp
SGEyebrows.esp
ClimatesOfTamriel-Dragonborn-Patch.esp
Lieyes_v1.0.esp
RaceMenu.esp
ClimatesOfTamriel-Dawnguard-Patch.esp
BFSEffects.esp
Customizable Camera.esp
Differently Ebony.esp
Hothtrooper44_Armor_Ecksstra.esp
EmpyreanWarpaints.esp
EnhancedLightsandFX.esp
MLU.esp
AOS.esp
DeadlySpellImpacts.esp
AOS2_DSI Patch.esp
MLU - AOS2.esp
ScarletMonastery.esp
ELFX - Exteriors.esp
WM Flora Fixes.esp
ABT - Faster Arrows Improved +50%.esp
ClimatesOfTamriel-Dungeons-hardcoe.esp
ClimatesOfTamriel-Interiors-Warm.esp
3DNPC.esp
Complete Alchemy & Cooking Overhaul.esp
CACO_USLEEP_Patch.esp
CACO_Wyrmstooth_Patch.esp
Immersive Sounds - Compendium.esp
ISCompendium AOS Patch.esp
IridumEyes2.0.esp
MatureSkinComplexions.esp
SC_hairs.esp
Skyrim Immersive Creatures.esp
Rebirth Monster.esp
MLU - No Combat Boundaries.esp
MLU - Static PermaZONES.esp
PermaZONESLegendaryBalanced.esp
Cloaks - Dawnguard.esp
Guard Dialogue Overhaul.esp
Helgen Reborn.esp
Civil War Overhaul.esp
Ordinator - Perks of Skyrim.esp
Duel - Combat Realism.esp
MLU - CACO-Ordinatored.esp
MLU - Ordinator.esp
CACO-Ordinatored.esp
Skyrim Immersive Creatures - DLC2.esp
Hothtrooper44_ArmorCompilation.esp
MLU - Immersive Armors.esp
aMidianBorn_ContentAddon.esp
AMB Glass Variants Lore.esp
AOS2_GDO Patch.esp
Lore Weapon Expansion.esp
MLU - Lore Weapon Expansion.esp
Skyrim Unbound.esp
MLU - SIC + Rebirth Monster.esp
High Level Enemies - SIC.esp
Cloaks.esp
SMIM-Merged-All.esp
ForgottenCity.esp
Darkend.esp
Extended Encounters.esp
Apocalypse - The Spell Package.esp
Apocalypse - Ordinator Compatibility Patch.esp
Rebirth Monster - SIC Patch.esp
Skyrim Particle Patch for ENB - Flame Atronach Fix.esp
dD - Realistic Ragdoll Force - Medium.esp
dD-No Spinning Death Animation.esp
iHUD.esp
Bashed Patch, 0.esp