I abandoned the three pass shave some years ago, like you after some experimentation, and now I do just WTG and ATG passes... Neck area included, as WTG on my neck doesn't shift many whiskers..I have a very tough beard.
The combination of razor/blade I use at the moment is an old, Nickel plated brass ball end Tech..older than I am, combined with either a Gillette Platinum, or a Polsilver blade..Both from Glen at Gemstone trading( Great guy to deal with)...The blades are used twice only then binned as experience has shown, on my beard at least, that the blade's struggle and have to be changed mid shave if I try for three consecutive uses...
I sometimes have to re-soap under the neck area to get a BBS finish, but rarely if ever any soreness...
I finish the shave with a very thorough rinse (important) followed by ONE drop of Lavender oil, dripped onto a wet hand, wet hands rubbed together,then massaged into the wet facial skin...I buy the oil from Yorkshire Lavender by the way.
But we're all different, what works well for me, may not be as successful for someone else..This is just my routine.