Hey so I have met some regs that like to 3bet me a bit lighter than usual which is due to my high overall foldto3bet of about 65%.
However this value of 65% foldto3bet is mainly due to people 3betting very tight ranges so I don't need to defend MDF vs most.

Okay but it seems like some regs who usually only 3bet around 3% vs UTG seem to 3bet like 4%-5% vs me. What is the adaption I need to make to counter their bit wider ranges? These low numbers come from FR btw.

I think calling lighter is out of the question because we still deal with really tight ranges. So I think the main problem is that I don't really know how their 4% range is built up. Do they just 3bet me lighter for value let's say AKo,AKs,QQ+ because they expect that I fold enough for AKo to be profitable+Postflop profit which makes it a pretty sweet 3bet.

Or do they only 3bet KK+ for value and fill that up with bluffs? Because in that case he would be folding about 75%-82% to my 4bet so I have a really profitable any 2 4bet bluff there.

But I don't know what I should do ingame.... would you go for the 4bet next time one of these regs 3bet me when I'm UTG? or maybe start out with a balanced 4bet range?

My range in UTG is: 77+,AQs+,AKo
My range in UTG+1 is: 66+,AJs+,KQs+,AQo+ sometimes suited connectors if I feel I will be getting a good amount of folds. And 66 is no standard openraise for me but on most tables I feel like 66 is profitable because I get a lot of folds and I have a postflopedge.