Quote from Flonne;124118:
I'm thankful I saved some ap to get r1 IS in two weeks. I think Yogurt did say that you could get r4+ crystals at a decent rate even with rF crystallization and r1 IS+upgraded crown ice wand. My mana crystallization is r3 though.
I had to settle for RC mana crystallisation, and deranked it later. Could not train on samhain for some reasons. I believe that RF crystallisation is only if you do it on samhain with a R1 icespear friend and damage upgrade crown ice wand.