muuuuhya

also "dD-Dawnguard-EBT Patch.esp" is obsolete as you already have the combined version "dD-Dragonborn-Dawnguard-EBT Patch.esp"

had the same thing, i think they are from the daedric quest for malacath, this usually happens when you reach the level requirements for the malacath quest

the bugged script dunmothmother is from the quest in falkreath which you can get by asking the innkeeper for humors, maybe you could try doing the quest and see if something is wrong

the mod starts in the bannered mare in whiterun, there is an imperial you need to talk to

navmesh are for the npcs, they are basically waypoints which tell them where they can go you should at least clean the main files from skyrim with tes5edit, one by one -> update.esm/dawnguard.esm/hearthfire.esm/dragonborn.esm in that order just click the link boss suggests for the tool and a guide a look into the papyrus log would help to find possible incompatible mods the options to activate papyrus can be found in the skyrim.ini under [Papyrus] and the files are under %my documents%/my games/skyrim/

skyre and a.c.e. are incompatible, they do basically the same in different ways, both are using scripts which will interfere, and i would place undeath before skyre/ace ... i think any type of quest mod should come directly after the unofficial patches before huge overhauls like ace/skyre/requiem