  We study families of metrics on the cobordisms that underlie the differential
maps in Bloom's monopole Floer spectral sequence, a spectral sequence for links
in $S^3$ whose $E^2$ is the Khovanov homology of the link, and which abuts to
the monopole Floer homology of the double branched cover of the link.
  The higher differentials in the spectral sequence count parametrized moduli
spaces of solutions to Seiberg-Witten equations, parametrized over a family of
metrics with asymptotic behaviour corresponding to a configuration of unlinks
with 1-handle attachments. For a class of configurations, we construct families
of metrics with the prescribed behaviour, such that each metric therein has
positive scalar curvature. The positive scalar curvature implies that there are
no irreducible solutions to the Seiberg-Witten equations and thus, when the
spectral sequences are computed with these families of metrics, only reducible
solutions must be counted.
  The class of configurations for which we construct these families of metrics
includes all configurations that go into the spectral sequence for $T(2,n)$
torus knots, and all configurations that involve exactly two 1-handle
attachments.
