thoughts on blinds play

I'm making the move to full stack 6 max so i'm trying to find the right attitude to take when playing in the blinds. Although it's possible to win at 100nl by staying a nit I think its a spot I need to work on before i start moving up.

1. SB facing unopened:
Against nits that won't adjust its fine to open ATC to 3x
we're risking 2.5 to win 1.5 so if they fold more than 62.5% (2.5 /(1.5 + 2.5)) we're making money without any postflop play.

Against calling stations and players that will 3bet light, just tighten up to UTG+1 or CO range. Then you can either call or 4bet light?

2. SB/BB facing steal:
Lets assume villain has a BUT RFI of 40-50%
Against players that will fold a good amount to our 3bets, we should 3bet a polarized range of monsters were fine to get AI with and smaller pairs, SCs that we can fold easily if we get 4bet. We can call with hands like KQ, AT since we're not comfortable getting it in preflop but were definitely ahead of their range. However, this puts us in a spot where we have to play OOP postflop.

Against players that will call our 3bets a lot, we should just 3bet the top 1/2 of their range. This way we have initiative and were often ahead of their range postflop. No need to 3bet SCs since we don't have much fold equity and the pots we win postflop will often be small since they don't necessarily have premium hands when they call.

3. Steal facing SB/BB 3bet:
facing players that will 3bet light vs our steal, we should be more entailed to call. Our premium hands will get paid off more from hands like ATs that would just fold to our 4bets. If they keep 3betting us we just tighten our steal range.
The other option is to start 4betting light.

What do you guys think?