Side note on P, B and C: in terms of five letter words, there are vanishingly few; maybe two or three? PUBIC is the only obvious one.
I use this (the second table).
https://www3.nd.edu/~busiforc/handouts/cryptography/letterfr...
I memorised STARE/TASER, UNLID, CHOMP (all the letters with more than 3% incidence, in a word order with a good letter distribution close enough to the statistical one, and some useful letter groups) and the remaining significant ones(GBFYWKV) and work with that.
If I get a green from the first word I assemble a new word from the letters of the other two; this strategy has seen me guess it in two or three a bit more often.
This may be obvious but in your scenario where there are lots of permutations, it's worth considering that you can solve words two ways -- first by thinking of a word that fits the shape available, and second by carefully thinking of the words with the highest frequency unused letters in all available slots (if there are two or three remaining letters, a guess that is likely to provide you two yellows is vastly better than a guess that will provide you one green).
If you use a three word opening gambit (which you can't do in 'hard' mode) then you'll regularly guess it in four or five, anyway. I strongly suspect that four is the most common number of guesses for good players.
I don't understand the fun in playing easy mode and laying down words just to eliminate letters. I see a lot of people saying that it guarantees them a win in 4 moves, but once I adopted the above strategy I regularly started getting 2s and 3s. Four for me seems just ok, no big deal. At five I start making excuses/blaming the injustices of the game.
... and today I got a 5, so I will be signing the NYT petition, plus my elbow hurts /s
But I do use a start word and as a rule I will try to reuse all the placed letters if I get a single green.
Mind you, I keep frustrating myself because the redirect from powerlanguage.co.uk to the nytimes.com domain is in my browser history and if you accidentally use it again it destroys your stats. Which is fine today of course because I tried to solve it at 5am and didn't get it ;-) but still.
Eventually I will lose interest. Not sure when. A friend of mine pointed me at Sedecordle and I was like, no, not getting into that, and then there I am, addicted to it.
Then one day, I typed LAUGH and got 5 greens on the first line! Had to happen eventually, but still...
In my experience, Y is rarely difficult to place; it's almost always obvious when you're going to need it.
And you rarely need to think about J at all -- like with Q and Z, it's usually obvious when you need it. (Not many five letter english words have J anywhere apart from the first letter, and the few that do mostly have it in the second, like EJECT, or uncommonly the third, like MAJOR, though it might be more common in loanwords like BIJOU I guess).
Yep, I sometimes follow up with MANIC or PANIC if I've got too few letters, to test for C/P/M/N