I'll say "range increase" does play a big factor in many maps but then I'll bring Belinda > Yuyu on those maps.
Yuyu's increase range just isn't significant enough to justify the slot.
And if its super duper fast witch deployment, its almost always silver witches that cover it.

Add the 7% increase dmg which brings her to 570 which puts her only below despara, and the "most useful" witch imho.
And if you have despara, you will definitely bring belinda along for that 7% to all witches buff.
But the most important of all, HAVE YOU SEEN HER AFF ART + SAW ANIMATION? Its freaking 2 witches in one, top value pick.

Screw the other witches, belinda is all i need.