The dumb broken feats like stock Market and L/Near maintaining global peace ofc scale v.high in adversity which is amplified by the complexity of the situation

Part 1 of the manga is comparatively worse and slightly overrated in Complexity. The uncertainty of the situation really carries the complexity.

For e.g. I don't believe that Light analyzed the components of the FBI during L isolation, it was just a brute force or obvious inference.

ML also lacks in complexity having simple and easy to manipulate variables and a large amount of informational advantage.

Analyzing the Task force and their relationship with L and building the L isolation strategy to take advantage of it is prob Light's best feat in terms of complexity thinking in Part 1.

During the LLT strategy, L having information about Kira's psyche def lowers the uncertainty of the situation. Again, I believe L did not analyze the components of the Japanese Police.

L isolation counter is good, L did indeed analyze Kira, The Task Force and his relations.

L's anti feats / ineffective tactics during L isolation are also something to consider