I made a thread a while ago about creating difficulty levels for lockdown, but a large piece I'd like to pull from it is using family bonuses in lockdown. Such as: fiend and beast bonuses work on strikers, construct and undead work on guardians, and gremlin and slime work on recons. As of the moment, unique variants define lockdown, so why not make all unique variants at least mildly helpful?
A good point to discuss is what families go with each class. I figure devilites are fast moving and hard hitting, constructs and undead are rather tanky, and gremlins have stalkers, which is a PvE equivalent of a recon.
Ohhhhh! A lockdown suggestion!