BE MORE AGGRESSIVE!
Sorry, couldn't help with that old SH joke.
I'd take a shot, myself. If the waves are so bad that I can't get a good range on it, I'd estimate and enter one manually, fire a full spread. As long as I'm relatively satisfied with my speed and AoB estimates I'd be willing to flub a bit with the range on a spread.
If nothing else, you can do an end run if you miss.