  Mono-X searches are standard dark matter search strategies at the LHC. First,
we show how in the case of initial state radiation they essentially collapse to
mono-jet searches. Second, we systematically study mono-X signatures from
decays of heavier dark matter states. Direct detection constraints strongly
limit our MSSM expectations, but largely vanish for mono-Z and mono-Higgs
signals once we include light NMSSM mediators. Finally, the decay topology
motivates mono-W-pair and mono-Higgs-pair searches, strengthening and
complementing their mono-X counterparts.
