If the guy is very tight You should bet out on him , You should be very agressive towards them PRE and especially on flop when the pot is small. He's going to fold all crap hands and even medium strenght hands.
If the guy is a 10% NIT, river all ins are always NUT or close. They only survive holdem poker cos ppl like You pay them off, calling their all ins.
Don't feed the NITS