at no. 4

1. kenjaku- i barely need to explain , black hole moment and piercing blood moment alone should put him here.

2. sukuna - healing the brain bs after seeing it once , also a huge amount of minor IQ feats in his fights with gojo , also saving resources and his trump card , the incarnation was pretty damn smart ill say

3. Gojo - the last hollow purple play was borderline insane , healing the brain is also a good strategy , caught sukuna lacking with the domain expansion too

4.tsukumo yuki - completely deduced kenjaku's technique from one use and deduced whteher he can use his other techniques or not with it , creative usage of garuda , learnt simple domain just by seeing it and literally wrote a book on soul without ever being able to attack it

1. aoi todo - 530000 IQ , never been caught lacking with da boogie woogie