  The current reference High-latitude time domain survey increases the
completeness of transients with prism temporal time series data by adjusting
the ratio of prism-to-imaging time. However, there are two other nobs that
allow for a more complete prism coverage: prism cadence and exposure time. In
this white paper, we discuss how changes to the prism cadence and exposure time
-- in order to increase the fraction of observed transients with spectral time
series -- affect supernova cosmology, transient typing and template building,
and the study of rare transients.
