Alright my wife and I played 27 games of BR vs Eldrazi this afternoon. Here's what happened

Assemble the Legion - 0-3 on the Play, 0-4 on the Draw. My idea was bad. Sad panda

Stronghold Gambit + Wear/Tear - 2-3 on the Play, 1-3 on the draw. I routinely kept hands with discard + reanimation, but she had a leyline. I'd target her hoping to reanimate something of hers, and see nothing but Mimics and Endless Ones. I took a TKS once and eventually she found two mimics to hold it off. I got an Endbringer once and that was neat. I never got a Smasher.

4 Show and Tell + 2 Echoing Truth - 4-0 on the Play, 2-2 on the Draw. These results are flukey, she drew much more poorly here than she did earlier in the day, but on the whole I just had better ability to play around stuff. I haven't figured out what this does to the rest of my plan, and how to build a good sideboard out of the whole thing, but I greatly preferred this to either of the other approaches.