against a maniac,  you should adjust your 3 bet range. Just try to 3 bet the top range of big pairs like TT to AA. If your afraid of playin AK or AQ against a maniac, you could be thinkin about shoving preflop, because these manacs often snapcallin with A9s stuff 30-50 bb deep. So all other cards you should just flat call oop and try to catch some bluffs from the maniac. Also you have to adjust the cbet range. Just try to deception check behind some flop with middle and top pair. And try to smallball and catchin some steamin bluffs. In general you can say with really good hands you should blow up the pot, but with every huge range you should just give him the action.

i dont think you shold put to much emphasis on just one 3bet, but if he 3bets 2-3+ times in the first 10 hands then you might like to adjust. imo you can do a few thing to combat a guy 3betting alot, which is optimal will kinda depend on if villian is just blind spewy aggro, or controlled aggro... other factors to consider are the size of his 3 bets.

if he is 3betting huge and often i would tighten my opening range and look for a spot to four bet shove for value, maybe like AT 66+, at low stakes alot of agro spewtards will get it in super light and think you will find these hands crushing there range often enough. the range you ultimately decide on 4bet shoving will be villian dependant, you have to consider how agro he is and also how likely is is to call a 4bet shove light. if you tighten your opening range i would look to call smaller 3 bets with hands that play decent post flop ie 9T QJ and try and spike a decent flop. if he is the kind that will barrel no matter what and is just as likely to have air i would consider getting it in sometimes if you hit mid pair, esp if you feel like youve got fold equity, i wouldnt play too scared.

if the player is a good aggro player you might want to widen your 3bet calling range a bit and also start minR instead of 3x to reduce his value in 3betting. if villian is a good player you maight have fold equity making 4bets (not shoving tho), but this gets kinda risky as your commiting alot of chips. i would probly just minR and call 3bets a little lighter and not play too scared post flop if i spike a piece. imo a better player will be less likely to just barrel bluff for stacks in 3bet pots so you might be able to try to take advantage of your position too at times too if villian plays passively post

I think u can try Cog Dissonance's style which is limp every botton in the early of the match until u find out what's the villain's style and how to deal with it.

I'd actually suggest minraising to start.

Once you start identifying villain's tendencies sooner in the match, you can go back to your normal raise size, or even keep the minraise.

I don't prefer limping that deep because I feel it cuts down a lot on easy opportunities to build big pots for value, particularly in the lower stakes.

Limping does have the advantage of comfort and can allow the player to kind of ease themselves into postflop play, but I'd rather a $20 player play the $5s until he's more comfortable raising, especially in a turbo speed game.

That's no shot at Cog, however.  Paul is a great player, I just happen to feel a minraise > limping this deep.  In reality, your postflop play is going to determine so much more, and I would say Paul is extremely strong in that area and very good at articulating and teaching that to his students and to members in videos.