Just happened recently in the Iron Banner. On Asylum I popped a shield on the B Flag over two enemies and finished them with Secret Handshake. Titan came in with a Shoulder Charge, shotgun + melee. Two more followed and got the shotty. Last one tried for a Nova Bomb inside the Shield, but I guess he didn't have "Harder to kill when using Nova Bomb." Fun part was I had Helm of Saint-14, so they never saw it coming.