The Drokarr draws a lot of hate and I've stopped making it my Bloodreaper for this reason.
Instead, If I use my Drokarr at all, it is usually after summoning Mhegedden and a Bloodreaper'd afflicted demon.
He's a huge threat and gets treated as such. Instead of trying to defend him, you should rather throw more threats at the opponent to make him think twice about which one to deal with first.
Also: I enjoy a good Rise Again on my Drokarr, if he's already standing in a contested zone. Slow doesn't matter much when grapple, as well as your full action attack, demand that you stay in one place anyway. I have also occasionally made the Zombie Drokarr my Bloodreaper, if I'm already armored up and low on damage.