As far as clear vs black tips, you use them interchangeably. For filter vs unfiltered tips, I am sure it is the same since I did look into the liquid class for both, and they are identical. I also use them interchangeably in my protocols, as long as cLLD is not used, which then requires the black tips.
As for optimizing the liquid class, as @evwolfson stated, you can reference the Hamilton liquid handling ebook for guidance on how to optimize your pipetting technique based on the type of liquid you are working with.