The link has an extra 's' on the end loveletter's'.
I think everyone has their own bluffing techniques and strategy so half of the guide is just your take on the game and not much use. Once you get used to the bluff, there is always the double bluff by guessing a card with the guard that you DO have in your hand. So the guard guess revealing information is not absolute.
The priest and guard combo SHOULD be played, as the other players should let it play out to eliminate a player that isn't them. It's only the priest effect player that has to do something.
The stuff about ditching your high cards is not hot IMO. I am not going to ditch the countess unless I have something better to do.
You overrate the baron, by eliminating a player you yourself may give away far too much information. You need to make sure the timing is right.
And no mention of how to play the King?
The process of elimination and other logic can often mean that should be able to tell how the final round or two may play out and force a win, or at least see what option is best to take.