I am too sleepy to write because it's 11:30 p.m around here. I think that INTj can become creative and also from IN(T)j to I(N)Tj by finding some humanitarian activity: poetry, writing fiction. They can also strengthen their secondary by learning to brainstrom. When they learn to use their Role function, they can become emotional, laughy and theatrical. So to become into Secondary function subtype, they should learn to be impulsive, originally thinking and entertaining.