How hard does Spiritomb hit, though? Enough to KO through a couple of CM boosts? Or, on the physical side, with a Ghost move or Sucker Punch (which leaves you open to it CMing more). This assumes Reun has Shadow Ball/HP Fire/something, obviously.
Standard Renkulus normally carry Focus Blast/Psychic or Psyshock.
If Renk has Shadow Ball to hit Tomb:
If Renkulus has Calm Mind, it can't run Recover, meaning it will be worn down by physical attacks by Tomb.
If Renkulus has Recover, it can't run Calm Mind, which means it won't break Tomb [It won't outdo Rest, or even Pain Split]
Otherwise:
If Renkulus has both, it's completely walled.
If Renkulus forgoes Focus Blast, Tyranitar murders it


















