Epiphany can’t be rolled with Amethyst, you have to find the Item and then Jasper it.
bookmark this for future reference to help save on Crystals.
@ScArEdPyRo also, using Main & Hireling, you get a +100% Item Drop Rate over Cap, so going solo, you would get up to +200%, +250% with Epiphany (5). with Main & Hireling, you automatically get +100%, then up to +300% with Cap, +350% with Epiphany (5) (only the Cap gets boosted by Epiphany, not the bonus from having a Hireling).