
Actually you should try also /cache on f2fs. It doesnt have any downside and only has upsides. Doesnt even wipe any data.
for a long time I also kept cache in f2fs, but...
...tests say that the reading speed is slightly lower compared to ext4 (as opposed to writing that goes at least twice), therefore, since it is the cache (that a written once, THEN COMES ONLY READ), perhaps it is more correct to leave it to ext4 !
However I have noticed that the following governors decrease the fluidity of the animations of the drawer (I use TSF Launcher):
darkness , elementalx , interactive , nightmare
Instead, the following are perfectly fluid:
conservative, ondemand, blu_active
The first is fine to conserve battery power (but may be insufficient for some games),
the second is fast, but I had an unexpected restart,
blu_active looks perfect !