Basically go straight, hard, and relentless towards the road you believed. Accept no substitutes.
The more 'off the track' it is, the more the Si will explode; because you're basically using the attributes of Si only with a different direction. Expect the word 'unable to understand', 'foolish', and 'blind' to come out.
But don't be one. Look at different perspectives, understand them, their plusses and minuses (Ni's advantages), but go straight back to your road.
that being said, it's not going to be smooth and painless though. :| It's a vicious cycle of revenge...