  We study dark matter at the MSSM pseudoscalar Higgs resonance (A-funnel),
which is one of the few remaining MSSM thermal dark matter candidates in the
$100-1000$ GeV range safe from direct detection constraints. To illustrate the
various factors at play, this study is performed in two contrasting set-ups: a
bottom-up phenomenological MSSM (pMSSM) approach that allows significant
freedom, and the top-down, highly constrained Yukawa unified $SO(10)$ GUT
model. In the pMSSM, for $\mu > 0$, the entire parameter space lies above the
coherent neutrino background and mostly within reach of XENON1T and LZ, while
blind spots exist at $m_A\,> \, 800\,$GeV for $\mu < 0$; the strongest
constraints come from $A/H \rightarrow \tau \tau$ searches at the LHC. For
Yukawa unified models, the confluence of $B_s \rightarrow \mu^+ \mu^-$
constraints, fits to the bottom quark and Higgs masses, and gluino mass bounds
from the LHC result in a prediction: realizing the pseudoscalar resonance
$requires$ gaugino mass non-universality, with a mass ratio that is determined
to within a small range.
