Hi Honey, sorry that you still get up at night.
As with any bad habit, you just have to break it and there is no magic wand which can make it for you:). As you said he will be screaming - and I would say it's unfortunately to be expected as he is very used to this form of settling at night. So I would just try to prepare yourself and end it. You can do wiwo if he is an independent sleeper but being honest, with such a screaming not moaning, I would start from staying in his room at the beginning. You can go with wiwo when he wakes but is not screaming so much. It shouldn't take much - probably couple of days. But it will be difficult, there will be regression after 4-5 days and as you already tried , the first time will be tough as he already checked once that when he screams you finally react. But in the end - it will benefit.