Randomized surfing
The highlighted comment was created in this revision.
I've played around a fair bit with adding random factors to my surfing. (Very, very carefully - you don't want to sacrifice super effective bullet dodging vs weaker guns.) It seems like there has to be something there! But I never got it to outperform my non-randomized version. Will be cool to see what you come up with.
Edit: Might be more accurate to say I've played with adding it to my Flattener.
I still feel like there's more potential for randomness in surfing than has been seen in use to-date. Specifically, I have plans I've yet to try regarding what I'd call an "obsucated goto" movement to be used as part of surfing. Despite efforts I've heard of thus far being unsuccessful I have a feeling that against the strongest targeting systems out there, a well-designed "pure random" movement with "obfuscated goto paths" (important!) might at least perform around the same as surfing/flattening systems.