Or even destructive I suppose - just real criticism that could work or be useful.
I would say INTp in general, but they are my supervisor, so perhaps they really would be the best.
Do you think all supervisors would be useful in this way?
Opposites seem too pointless to have any affect.
PS: in general it seems like I could learn the most from gamma quadra. Beta and alpha may have insights, but as for actually balancing me out with useful insights, I would look more towards gamma.