I usually stick to the star patterns, but sometimes you have to improvise.
When Star Patterns go bad.
Once committed to the star pattern, after you've cleared the upper two left rivets and got the umbrella, sometimes you're trapped from getting back to the middle hammer. A decision usually has to be made. (1) wait and negotiate your way to the hammer, or two just go for the top hammer as if you are doing the weave pattern. Sure, there is one bridge rivet on the left that you still have to deal with, but usually the re spawning fireballs will go up to the left trap. Once up there, you can quickly get yourself back down to get the left rivet with usually only have to deal with 1 fireball, but you have many escape down at girders 2 and 3.
It's a good way out when your star goes bad.