Sarcasm

I thank you for this reply. However I solved it myself by simply installing the Core Patch esp alone so I could see which master was missing. It was aMidianBorn_contentaddon.esp. Looking at the Install page I see why - the massive Book of Silence installer guide takes up much of the page, with the content addon barely visible below. I completely missed it !

Thanks for your reply, since reading your post I have been researching my weather mods. It seems it was caused by ELFX, whose meshes have some sort of incompatibility with Windows 10. This mostly fixed it.

I seem to have figured this out. The crashes are caused by a single plugin, a mod that I actually made myself. It's a merge of many different armors and a few weapons. Not sure what I did, but I must have become lazy and made a mistake somewhere. Very, very strange that some armors can cripple a game in this way, but such are the mysteries of Skyrim. Now that I think this is over, I will mark it solved. Thanks to everyone who responded here!

I seem to have figured this out. The crashes are caused by a single plugin, a mod that I actually made myself. It's a merge of many different armors and a few weapons. Not sure what I did, but I must have become lazy and made a mistake somewhere. Very, very strange that some armors can cripple a game in this way, but such are the mysteries of Skyrim. Now that I think this is over, I will mark it solved. Thanks to everyone who responded here!

Thanks for your responding. I have had several issues with ICH in the past, so I chose to skip it when installing the STEP order. As for my OP problems, I made a newbie mistake having not realized how important the left pane mod order was! So I nuked everything and reordered the STEP plugins in correct STEP order and the non-STEP plugins by category and how I felt they'd fit into load order. Also, I think I broke the reproccer when I merged the updated XML scripts with it since they are more up to date then the Reproccer or its own Compatibility patch. That may have been why it was CTDing. I reordered and reinstalled everything and the Reproccers are all working now, for SkyRe, Dual Sheath Redux, and ASIS, hooray!
 
I hate to praise my own answer but I did end up solving it on my own soo, Best Answer!