Live?

I'd just play solid and significantly more value oriented and likely playing a bit higher vpip live. Once you get reads you can exploit, but you don't get very many hands and tells can be misinterpreted live so you need to be careful with how much you adjust. I read posts all the time from live players that are just absolutely idiotic. Was reading one today where guy said he was walking over the table so he widened his range and his question was regarding 63hh he had opened in Utg+3, don't do that. Also the question itself was quite awful in regards to the 63hh hand. So just keep that in mind. Post some basic questions. TLDR posts don't get responses very much.

I think you are really overcomplicating things here. Your main problem seems to be hand reading. I'll explain...if you are capable of putting your opponent in a reasonable range of hands, the way you can exploit his range should be pretty easy to find. For example, if you see a donk bet BB vs EP on Axx, even though it doesnt make sense theoretically for him to develop a leading range on this texture with these positions, you know that his range is likely weak Ax + some gutshots and 2nd pairs and stuff like that. Therefore, you know immediately that you can exploit his range by raising a lot since it is very weak and you are uncapped with a range advantage. If villain takes a weird line that you dont expect, you should just gather information to put him on a range of hands and go from there. When you cant put your opponent in a range of hands you can use general population tendencies. In the example hand you gave, his line is indeed weird, but you dont have enough info to accurately put him on a range. So you can use the general population tendency that people wont be bluffing enough in that spot, and since you have poor equity you should just fold.The thing is: you cannot "exlpoit" someone if you cant even assign them a range of hands. You exploit someone when you are aware of imbalances in their plays

Impossible to answer your question since it would be so villain read dependent but if anything bumping it up to 9x on the BB with A3o in a 6-way limped pot at 2/5 is just awful, people are not limp folding and trying to run people over oop post flop at small stakes is not a good idea.