Lyric 'baselines' are not my friend.

What is the best way of adjusting lyrics in individual staves and systems? Thanks, all!

At the moment you cannot adjust the vertical position of lyrics relative to the system, which is something of a limitation, though not a fatal one. I often find myself going to the Lyrics page of Engraving Options and reducing the default distance of the first line of lyrics from the staff: 1 space or even 3/4 space often looks good, depending on the general ranges of the voices and how often they go below the staves.