So, I've been thinking that sorcerer needs improvement in mostly a lot to be balanced with Rogue and Warrior.
Mostly, Rogue is the main character that deals too much damage even with skill.
I got killed instantly with me using level 30 sorcerer against level 31 rogue using a skilled arrow.

My suggestion: Lightning skill-damaging allies around isn't effective, what I would like is maybe make it a multiple lightning strike on enemies near your range attack.
Like once you unlocked lightning, it will state 'Deals 35-68 damages, 2 range attacks. Strikes 2 foes in 2 range.'
And next upgrade is 'Deals 80-125 damages, 3 range attack. Strikes 3 foes in 3 range.'

So, basically it does damage to the ones near you and not around a target.