Unit Leveling:15

This table applies to units that have an initial Next Lv value of 15 Primarilly this will be units like the following:
 * Zegar, Zephu, Lario, Weiss, Luna, Mifune
 * Graven, Siren, Elf, Ziz, Athena, Lich
 * Agni, Sergio, Lidith, Falma, Heidt, Shida
 * Galant, Stya, Nemia, Zeln, Alma, Oboro
 * Seria, Zebra