Subuddhi is Positive intellect. Here, positive means constructive: using thought to understand a situation, consider consequences and look for a workable response. It leaves room for criticism when criticism is needed.
The arrow from 22, the Plane of dharma, leads to 60. The board links conduct and responsibility with the quality of understanding. The arrow from 28, Sudharma, has a different destination: square 50.
Notice what your thinking is doing for your current question. Is it clarifying options, gathering useful information or repeating the same dispute? A next step might be to define the decision more precisely, seek a missing fact or set a time to stop deliberating and act.