For extra style points, elbow barge the jaw off the daemanhost with your ability [F], make sure the shield is equipped. Use your weapon special, [mouse button 5 by default, i believe] and don't let go lest you want your life to drain faster than a heretic in the presence of the inquisition. Ensure it's the special ability you're using otherwise it will drain stamina on right click.

will obviously only work if your team are supporting you and actually killing it otherwise you're going to be there until the corruption gets you. I suggest two zealots with the thunder hammer like in the video to get it done quickly if you need the Banisher penance. but generally any weapon gets the job done if you use it well enough.

IT'S IMPERATIVELY IMPORTANT YOU ARE THE FIRST PERSON TO TOUCH THE HOST, YOU CANNOT PROTECT YOUR 'LIL ONES AS EFFECTIVELY WITHOUT ITS FULL ATTENTION ON YOUR GLORIOUS IMPERIAL SLAB.