I use inks a lot but haven't really deviated much on the process for different results. What I use inks for is shading, I haven't done any glazing or tried using inks for effects. So for what I use inks for, I have a flow improver that I add to the inks to break down the surface tension and allow it to flow better. I got my flow improver at an art store for really cheap considering it'll last you forever. The flow improver does the same thing that dish detergent does, I just use it instead of detergent because it's easier to add to the inks in the exact amount you want.
For most of my inking, like anything painting related it varies, I'll add one drop of flow improver to one drop of ink. That will keep the ink dark and allow it to cover better. For lighter variants of the ink, I just add water in addition to flow improver to get the lightness I need.