The Green shaded lines:
The best lvl that minimum exp input gives best exp output, (exp gain - exp input = MAX compare to other levels)
The red shaded lines:
The highest lvl possbile that exp gain >= exp input
Exp are calcualted when evolving with same attributed monsters (50% bonus)
AcExp : accumulated exp
The number beside card name (eg, smile, 450): the amount of exp incrementally for each extra level.
1: slimes are rarity 1 and elf, witch are rarity 2 evoluation (unevolved) (slime wrong typing)
2: slimes are rarity 2 and elf, witch are rarity 3 evoluation (evolved)
U can farm witches and elfs (unevolve) on side quests 3rd seal
U can farm witches and elfs (evolved) on side quest 4th seal
Suggest farm them on 50% energy, you basicly could level up to 60+ without spending any gem, max one lvl 70 char per day woot!!!!