Can something be done about malzahar's mana costs?

is there any reasons for him to have his W costing 90 mana at level 1? last time i checked he can't push the lane, or oppressing you with it nor poking the enemy every time it's up. there is no reasons that null sphere costs 90/95/100/105/110 mana. malefic vision costs Cost: 60 / 75 / 90 / 105 / 120 mana because it's targeted and can be spammed to oppress the enemy laner, but call of the void has nothing to do with it, nor his ulti which costs 150 mana. are you forcing him to build mana to prevent him from rushing AP? why every AP don't have his treatement then? or do you want him to use his E to regenerate mana?well that's too bad, because with 6 creeps killed he only regenerate 36 mana (if we count the cost) and that's only if he doesn't use his Q to clear.