Yes, I'm asking you to rate the MBTI-related cognitive functions per level of comfort they give to you in times of stress.
For example, I'm pretty fond of regular things AND random, insightful things when I'm in good condition. But, when I'm slightly sick, like running a low fewer, I probably like to do something crazy or just do almost nothing at all. But, when I'm running a high fewer, I just want to regulate everything I do and do everything very regularly with minimum amount of surprises and maximum amount of harmony, repetition and the least amount of surprises or action.
Hence, for a time when none of my ability is impaired, I prefer functions Te - do something. Ti, think of something. Se - experience it! Ne - imagine it!
When some of my ability is impaired because of an ilness, I'm most probably Ti- think of it! concentrate on it. Ne, imagination all the way! Fe/FI.. let's feel it.
When I'm greatly impaired, as in high fever, other ilness etc I'm most probably Si .. let's do this thing. Ti.. Yes, this thing involves these ideas. Fi. I feel lousy. Ni. This is a usual condition for a human.
So, all in all, I'd say that Si is my comfort function.