This may sound like a dumb question, initially, but I am looking to level Tiburtus to 4/70 or Sartana to 3/70 for the next event (Guardians? Yellow reflect?)). My best team right now is Boldtusk, Grimm, Cyprian, Melendor, Wu Kong.
Of course, if I level Tiburtus I can use him in both intermediate and advanced. If I level Sartana, she’ll be tier 3 and I can only use her for advanced, but she’s obviously the best long-term investment.