I think you're overthinking.

I raise KQo and AJo UTG in 6max. ATo i pitch, ATs I raise sometimes.

I would raise KQ and AJ anything after UTG+1, and ATo from middle position, no matter how many limpers. Just be sure to increase 1BB per limper to your raise, and pitch dominated shit like KQ, AT to a position reraise. Best way to lose money is to play easily dominated hands out of position.

wow <5% pfr is very low. You can raise lots of stuff in LP. EP play very tight as well as out of the blinds. But if you are in LP against liimpers or no limpers. Doesnt matter. Raise Any 2 big cards and pairs. You could even raise SC type stuff, In particular if nobody has lmped. But if there is a >1 limper I would probably just limp along with SCs and gapped SCs trying to hit a cheap flop. (*at those stakes and FR).

I can send you a good starting hand chart for 6max. But from what I can tell you are playing Full Ring?... But if you want the chart IM me at satyricscott on AIM. It will have you play 15vpip & 12%pfr or so. Which is tight.. but a good way for noobs to start out.