each object have different weight to them and their usage differs between sections of songs.
for slow or calm sections you'd want your rhythm to reflect those, you'd generally want them to be simpler.
for more intense sections you'd want to emphasize those so usually it involves more dense rhythm.
for most cases circles hold a lot of weight to them.
you'd generally want to use circles for prominent or stronger sounds cause making those sounds clickable gave them more emphasis.
slider doesn't hold as much weight compared to circles cause the end of the slider is not clickable and generally the hit window on slider head is a lot more lenient compared to circles.
that asides slider head is still clickable so you could use them for something that started out strong and end the slider on a weaker sound.
other than that you need to held a slider to play it so you could use slider for held sounds, stuff like vocals are usually held so you'd typically use a slider for those.
ive looked through some of your maps and you seem to generally have a decent understanding of rhythm already.
i could point out a couple of things about them such as your rhythm priority and choices but i don't think this is the right forum for me to talk about those.
if you'd like me to point them out or if you have any other mapping related questions then feel free to message me ill be more than happy to help