Mercury71

Do not install it trough MO2 like that. Follow the installation guide for SKSE64 in the STEP Guide under 02-Extenders
 

Sorry for that.
You can use Nemesis for any mod requiring FNIS.
(i wrote that about creatures just as extra information that Nemesis can not be used for creature animations)
Nemesis will probably work fine with tha mod you linked.

Make only mod for xEdit.
DynDOLOD, xLODGen and TexGen will have their mods made in another section of the guide, STEP 5. 
Loot dont need an empty mod.
The cleaned masters will be handled in another section of the guide, STEP 3.

SOLVED... (in a way).
 
Replaced "mountaincliff04.nif" in MM v2.82 with the same file from MM v2.3
 
(Found the answer in the mods bugreport)

I just did this as Lexys guide here say:
 
Open SSEEdit and load only Dawnguard.esm
Once loaded Left click and open CELL > Block 5 > Sub-Block 3 > select 00016BCF. Scroll down the view window on the right to find XEZN subrecord referring to RiftenRatwayZone [ECZN:0009FBB9]. Right click and select Remove.
Next Left click and open CELL > Block 2 > Sub-Block 1 > select 0001FA4C. Right click and select Remove.
Last Left click and open CELL > Block 8 > Sub-Block 1. Right click and select Remove.
Click the [X] in the upper right hand corner, uncheck "Backup plugins", and click [OK].

I just did this as Lexys guide here say:
 
Open SSEEdit and load only Dawnguard.esm
Once loaded Left click and open CELL > Block 5 > Sub-Block 3 > select 00016BCF. Scroll down the view window on the right to find XEZN subrecord referring to RiftenRatwayZone [ECZN:0009FBB9]. Right click and select Remove.
Next Left click and open CELL > Block 2 > Sub-Block 1 > select 0001FA4C. Right click and select Remove.
Last Left click and open CELL > Block 8 > Sub-Block 1. Right click and select Remove.
Click the [X] in the upper right hand corner, uncheck "Backup plugins", and click [OK].