Do you believe in or prescribe to enneagram?
If so, why? It has zero Ti.
If it has Ti, maybe you could explain it? It seems to me like it is just a bunch of stuff thrown together with no actual logical glue (unlike socionics which has a pretty good Ti base).
Actually, i'd be suprised if logical types in general take more than a passing interest in it (given Te types still have strong Ti).