Isolation Qs - basic premise

Ok Id just like to hear some thoughts on isolation and the range of hands ppl like to iso with.

Brief example which I find v common at all small stakes form 100nl below....

assume 100bb stacks

weak player (say a 30/8 passive) limp UTG or UTG+1
Hero is in CO or BTN
BTN (if we are CO) and blinds are either a mix of nits or tags

We almost never expect to be 3 bet light!!

Its a really simple kinda spot but id like to hear thoughts.....

This is where my post in the beginner forum comes in.

If this guy folds a lot of flops, I'll isolate with almost ATC because my value comes from c-betting almost all flops and him folding a lot. I'm happy to raise a touch more v's this guy PF also to build the pot.

If this guy is a station postflop, then I isolate with any two cards T or higher, dont c-bet as much as normal (v's some guys hardly at all) if I miss, but value bet fairly large any pair I hit. I'm happy to raise this slightly lower PF if its still likely to isolate him, since my value comes from value betting postflop, so risk the minimum when I miss.

Thats obvious with fairly extreme cases, and the rest of the table matters.