Level up/skill improvement of characters

For all whom are new to the game.
The best way to level up the team members is match the elements to absorb
The best way to improve skills while leveling up your characters is to match character for character.
Example: Sharan absorbs Sharan resulting in level up + skill improvemant.
Just remember to use as many as same character to aquire 75 to 100 % skill.improvement every time
4 sharans =100.percent skill aproval for sharan