Using "Divine Sentinal Support"
Little late, but just picked this up and wanted to chime in:
Currently I'm using holy strike as my main skill and using Generals Cry with Dom Blow for extra minion generation on a Guardian. Slotting this into the Cry + Dom Blow DOESN'T change the reservation cost of Cry (since it modifies the Dom Blow gem, not the Crys cost I guess?).
So I auto-generate these Dom Blow bros for "free" (still need corspes, I'm using Desecrate in Boss's/Pinnacles, which is annoying but worth it) and their auras also boost my other minions damage, especially the Holy Strike Minions (idk if they double dip the buff or not, but still, +30% more phys damage as two ele's is pretty sweet).
Maybe I'm missing even more tech, let me know if ya'll have any other crazy ways you've used this gem, please, cause I love it!