Enablers? I'm assuming you mean "teammates". Well it sounds like running hazards will help your team out. TR Reuniclus doesn't usually have room for Calm Mind or Nasty Plot, meaning that it isn't quite as powerful as it wishes it was. Running lots of hazards (mainly SR and Spikes) can help wear down pokemon to ensure a Reuniclus sweep. Spikes will also help against Jirachi and Ferrothorn, the two most common Steels used in Rain, since both are grounded. As for your setter, I'm recommending a Ferrothorn of your own. Ferrothorn can set up hazards, is immune to Sandstorm, and uses the opponent's Rain against it. Even better, Ferrothorn is slow enough to abuse Reuniclus' Trick Room should it faint early. Here's a set for your team:
Ferrothorn@Leftovers
Sassy Nature, 252 HP / 200 Att / 56 SpD
Spikes
Gyro Ball
Bulldoze
Leech Seed/Power Whip/SR
This isn't standard Ferrothorn, but it works well for your team. Spikes is there for the explained reasons, while Gyro Ball is your main STAB, boasting perfect accuracy and usually 120 BP. The interesting move on this set is Bulldoze. Bulldoze lets Ferrothorn damage Steels who normally wall it all day long. Unfortunately, it's not very powerful so Ferrothorn needs to invest heavily in Attack to break SubCM Jirachi's Substitutes. The last move is more open ended, but I recommend Leech Seed or Power Whip. However, if you don't have anything else to set up Rocks, then Ferrothorn can do that as well.
It's important to not play this Ferrothorn the same as the standard one. It's not as bulky, and will get worn down faster. If you'd rather have a bulkier variant, it's probably not even worth it to run Bulldoze at all. Either use the extra Attack EVs or run a standard move set.