You are good I made the same
What do you think???
Ths problem is if you have a hero (str and agi) for 1 point they get 1 damage
For Int heroes they get 1 damage with the 5 spells
(1 x 2,25 x 5) x 3 + (1 x 5 x 6) + (1 x 8 x 5) as potential and maximum damages
You know what I mean for 1 point of intelligence you increase every spells so your potential damages are bigger than with 1 str or 1 agi
I can do :
1,5 + (1,5 x Lvl) Basic (2,25)
3 + (3 x Lvl) Ult (5)
5 + (5 x Lvl) Insane (8)