At least I was able to clean up my game though, I moved it's install from the program files (x86) folder to a separate one elsewhere so that I could use BOSS, worked like a charm. Not on fixing the crash though...
Active Mod Files:00 Oblivion.esm01 Francesco's Leveled Creatures-Items Mod.esm02 Francesco's Optional New Items Add-On.esm03 Oscuro's_Oblivion_Overhaul.esm [Version 1.34]04 Mart's Monster Mod.esm [Version 3.7b1]05 FCOM_Convergence.esm [Version 0.9.9a7]06 Unofficial Oblivion Patch.esp [Version 3.2.0]07 UOP Vampire Aging & Face Fix.esp [Version 1.0.0]08 DLCShiveringIsles.esp09 Unofficial Shivering Isles Patch.esp [Version 1.4.0]0A Francesco's Optional Chance of Stronger Bosses.esp0B Francesco's Optional Chance of Stronger Enemies.esp0C Francesco's Optional Chance of More Enemies.esp0D Francesco's Optional Leveled Guards.esp0E FCOM_Francescos.esp [Version 0.9.9]0F FCOM_FrancescosItemsAddOn.esp [Version 0.9.9]10 FCOM_FrancescosNamedBosses.esp [Version 0.9.9]11 Reznod_Mannequin.esp12 DLCHorseArmor.esp13 DLCHorseArmor - Unofficial Patch.esp [Version 1.0.5]14 DLCOrrery.esp15 DLCOrrery - Unofficial Patch.esp [Version 1.0.3]16 DLCVileLair.esp17 DLCVileLair - Unofficial Patch.esp [Version 1.0.5]18 DLCMehrunesRazor.esp19 DLCMehrunesRazor - Unofficial Patch.esp [Version 1.0.4]1A DLCSpellTomes.esp1B DLCSpellTomes - Unofficial Patch.esp [Version 1.0.1]1C Tyrael Armor.esp1D DLCThievesDen.esp1E DLCThievesDen - Unofficial Patch.esp [Version 1.0.5]1F DLCThievesDen - Unofficial Patch - SSSB.esp [Version 1.0.4]20 ExnemRuneskulls.esp21 FCOM_ExnemRuneskulls.esp [Version 0.9.9]22 Bob's Armory Oblivion.esp23 FCOM_BobsArmory.esp [Version 0.9.9]24 Oblivion WarCry EV.esp25 FCOM_WarCry.esp [Version 0.9.9]26 Oscuro's_Oblivion_Overhaul.esp [Version 1.34]27 OOO-No_Guild_Ownership.esp [Version 1.33]28 FCOM_Convergence.esp [Version 0.9.9]29 FCOM_EntropicOrderRebalance.esp [Version 0.9.9beta2]2A FCOM_RealSwords.esp [Version 0.9.9]2B OOO-WaterFish.esp [Version 1.34]2C Amajor7 Imperial Furniture.esp2D GlenvarCastle.esp2E Romuska Fantasy Store.esp2F DLCFrostcrag.esp30 DLCFrostcrag - Unofficial Patch.esp [Version 1.0.4]31 Knights.esp32 Knights - Unofficial Patch.esp [Version 1.0.9]33 TOTF.esp34 RTT.esp35 The Lost Spires.esp36 Lost Paladins of the Divines.esp37 FCOM_Knights.esp [Version 0.9.9]38 FCOM_Ruin.esp [Version 0.9.9]39 Harvest [Flora].esp [Version 3.0.0]3A Harvest [Flora] - Shivering Isles.esp [Version 3.0.0]3B Harvest [Flora] - DLCVileLair.esp [Version 3.0.0]3C Harvest [Flora] - DLCFrostcrag.esp [Version 3.0.0]3D DecoratorAssistant v1.1.esp3E Leviathan Soulgems.esp3F MidasSpells.esp40 Francesco's 10 days respawn time - 1-20 day lenght rescale.esp41 OOO-Magic_Script_Effect_Fix.esp [Version 1.33]42 Bashed Patch, 0.esp