Casting Kassadin's E should have one requirement, not two

So in order for Kassadin to use his E, 6 skills need to be cast around him. I find this quite ridiculous. It just doesn't make sense for a regular skill, not even an ult, to have such a complicated requirement. Even Maokai's passive requires 5 skills to be cast around him. Kassadin basically needs to survive through lane phase with two skills, one skill if the enemy laner is ranged until he hits 6. I understand that Kassadin is a pretty risky champion to buff because of his mobility and utility after 6. But the "6 skills" requirement needs to be gone. Maybe in exchange the cooldown could get increased to 7 or 8 seconds. Whatever the method, something needs to be done.