We use 40 KIAS for Vtoss for towering (Helipad/Heliport and Offshore) - 50 KIAS Clear area.
But, normally, it starts with visual lateral hover cues and remains that way until through TDP and Vmini. So, loose the cues too early and you are flying through the next hole in the swiss cheese.
I say 'next hole' because you've already made it through a few, prior to being in the hover with no external take off cues.
As do we. In fact, ye may be we.
I was kind of making an overarching statement based upon a few others I've seen and heard about as well.
Again, no disagreement with anything you put above, but all things considered, I think I'll have a cup of coffee.