Reuniclus gets Magic Guard, it doesn't take damage from Life Orb. If you're going to use TR Reuni on your team you'll want at least two other TR setters who can function as sweepers. Gallade, Chandelure and Victini are killer under TR which they can set themselves. A good defensive setter would be Pory2 (don't know too much about TR, only have one team and I suck at it).
Also don't underestimate the damage from Life Orb; it's a 30% increase in raw damage - that's a lot.
Oh, and Espeon and Sylveon (aka 2 cutest pokemon) are actually really strong if you really want that. Sylveon is one of the greatest Special walls in the whole game alongside AV Tyranitar and the pink blobs, while Espeon gets the rare Magic Bounce which is an absolute godsend against hazards and status.