I did this in one of the first boss fights while rescuing the Druid in early game. I pushed an underling off a ledge into the Giant Spider pit which kited them into the battle and drew the bosses agro allowing me time to finish off most of the underlings before focus firing.
Hah yes, this is one thing I've been enjoying a lot with my Warlock and Eldritch Blast, I love the multi level fighting in this, I hear Solasta is good for it too