My note:
Trait
[Q] Increases slow amount from 15% to 20%.
[W] deal 15% damage over 4 second.( 5 second decreases to 4 second).
[E] Chain up to 5 other target with 80% damage.
Q,HoarFrost:Define cooldown and mana cost ( 14 second cooldown and 60 mana cost).
W,Fire Storm: reduce middle line damage from 150 to 140 and other lines from 175 to 165.
Define cooldown and mana cost( 14 second cooldown and 60 mana cost).
E,Lighting Bolt: reduce damage amount from 180 to 165, but add a new object,hit enemy Hero cause to stun them for 0.50 second.
Define cooldown and mana cost(7 second cooldown and 25 mana cost).
Suggest: replace Q and E location, in really Q=Lighting Storm and E=HoarFrost because I prefer to cast my Q with a more simple level.( self idea)
Suggest: I more emphasis on your talents,work on objects that decrease cooldown of your basic abilities,and empower them with talents and don’t increase their damage so much in base.
Suggest: this Hero need some mobility a bit movement speed and need some stability,make it stronger.
Suggest: your H1 and H2 need some object for getting improve,like as increases wide and area and reduction it’s base damage,or I suggest to define slow amount and create stack for them each time they hitted on enemy Heroes like as 2% for every missle up to 40%,this and same cause it more effciant and have more chanse on hitting enemy.