After bottom hammer, if everything steered well you should have a fairly clean board again so transition is easy. Even steering 2 or 3 barrels away is cheap to get to the grouping location.
That said, if things go poorly from a steering standpoint, or you were forced to grab at a weird time, you can have a mess. And yeah, you’ll need to be adept at a lot if barrel combos to make it up without dumping a ton of points. I think the only time it’s really hard is when a fireball starts to chase you up and you’re forced to rush it and screw up with either a wild or a bad combo. The most important part is to not panic.
Stay calm, play fast and loose, and you’ll score.