Ok, let's assume that the watcher set drops from a special monster you summon into a master expedition by using a special combination of crystals at the start.
Let's also assume you need to have an empowered resonator from the tutorial quests.
Afaik there are 5 types of crystal: chaos, balance, empowered, rage, and whatever the last one was. Ad, gold, drop, drop, and rp.
5x5x5 means 125 possible combintaions.
However, I guessing it won't be 3 of a kind, so 120 combos.
Almost certainly, they will be all different, so 5x4x3 which means 60 likely combos.
Since everybody has been running with rage in the first slots, then also likely it's not that.
So, basically, get your enhanced resonator from the quest. Slot three different runes, but not rage first. Write down what you've tried, and post combinations here.
Also, a bit of a stretch, but cryptic gave us all the myconoid pet, perhaps that needs to be summomed while you run the MEs.
Anyway - gl.
No idea what my toon is now.