[Black Tiger]

Is not quite what I was invisioning, I wanted more a click and bum, you are located on the thread on your last post, but I guess it will do it. I'm still on 3.8 and don't have that

Maybe I'm missing something but if all is well, in every thread you participate, there will be a little arrow or reather a little V picture in front of that thread.

If you click on the little arrow, you will be taken to your last post in that thread. Seems exactly what you want.

If I understand you correctly, you only have this option on the forumhome and not on the forumdisplay?
If I'm correct, then something is wrong with your vBulletin, because this exists already a long time and is also present in the forumdisplay where you see the list of threads in the subforum.