I agree with you, man, when I do the shape, the signal sometimes disappears, but I realized that you can tell exactly when the signal disappears, it slowly becomes transparent, so if you see this, just don't do it, find some other signal.
Viewing post in Coordinating is f###ed
There's a couple tricks. One, color of arrow is useful along with the distance. Another thing I find fun is moving the first point INSTEAD of the cursor because it shorts you one cooldown even if the points move slower than the cursor. Winds up mostly faster because by the time the 2nd point is in place you can move the 3rd, the one you're controlling, into the right position and ignore cooldown.