Oh, that's an interesting technique. I'll try it with my equipments. Bad thing i only get lvl 10 necklaces xD

By the way, those guaranteed 4* and 5* como from tickets, and (i think, please, if possible check with someone more fluent at japanese, google translate or that has played at DMM extenively) that they come from events, or at least i think an event gave a 5* ticket. They could be real money buy items though and i wouldn't be too surprised.