Could use some help here, good folks - again, I guess.
I simply cannot get them to work together. I untick the (pink/red) box within wrye bash, rebuild the patch - game's starting up as usual. But DeadlyReflex isn't activated that way, is it?
Putting the .esp at the very end with OBMM doesn't help either - game won't start.

Run BOSS to get the correct load order, make sure the Deadly Reflex plugins are checked, rebuild the patch (not actually necessary when adding DR AFAIK, but generally a good idea when adding mods).

I don't really understand what your problem is but what i can say is that there is nothing in deadly reflex mod that needs or should be imported into a bashed patch. The bashed patch is basically just a way to fix incompatibilities when multiple mods change the same types of stuff. So yeah just follow ark's directions.

I think I might have an idea what your problem is: weirdness if you merge DR into BP? Dependence on the mod and you can't use old saves without DR?
I had that. And, because as mentioned above DR has nothing to be merged, I have tagged the esp and esm with the following tags: Deactivate and NoMerge.
Thus, before i start rebuilding the patch, WB turns them off and does not include them into the BP, I manually activate them after BP is rebuilt.

Does this help?