Ok.
1.Raiton is a great for offense and quick finishing,which will be my style (For example,Chidori) .It can also be used for defense (For example,The Raiton Armor that A uses).Raiton can be used to increase the sharpness of blades or kunai and also making the Raiton travel through it as metal is a conductor of Raiton,as seen in the battle between Sasuke and Itachi where Sasuke threw a huge shuriken at Itachi and feeding the shuriken with Raiton chakra,cutting the normal kunai in half that Itachi was using to block the shuriken.
2.Raiton's weakness is Fuuton,because it is an insulator to Raiton.
3.Raiton's strength is against Doton,as the Raiton chakra travels through it,nullifying it.As seen in the fight between Sasuke and Deidara where Sasuke nullifies Deidara's bombs with his sword,which was charged with Raiton chakra.
4.1) Sasuke
2)Kakashi
3)A
4)Darui (his Storm element requires it,which is Suiton+Raiton)
5)Third Raikage