Overlapping sprites - Change of color where there is overlap

[Coo-per]

I'd like to display sprites that are overlapping, but where a sprite overlaps- display a different color. To make a sprite appear almost transparent. (See example image below.) I've read through a bunch of the functions and didn't see any functions/examples which would do this.. although I could be missing something.

In my application there will be 1 known sprite that overlaps several other sprites (which maybe rotated) and needs to have the overlap distinguished. I've landed on pushRotated(TFT_eSprite *spr, int16_t angle, uint32_t transp) which allows to "Push a rotated copy of the Sprite to another Sprite." I'm thinking I can inherit the TFT_eSprite class and implement a new version of pushRotated which calls readPixel on both the source AND destination pixel, and either mixes the two colors together or adds a configuration to set the color of overlap via function argument. Because of limited experience with esp32/tft and before I chase a wild goose I wish to know:

-Is this something that exists already that I'm not aware?
-Does the plan above seem to make sense/run fast enough on the hardware?
-Is there a faster approach that would run smoother? (Elements may move on screen, so speed is a concern)