It was quite simple, i'll be honest. I did not need to pray either, karils has decent defence. I was using the following gear to do this:
Karil's set, ring of vigour, Sgs, barrow gloves, ranger boots ava's and salve amulet.
I sometimes managed to even kill them with less than 20 seconds, just because karil's can often even hit 50-55 with the special set effect and salve.
Pkers however, i escaped easily because of having a good shield in my inventory. I used a blessed spirit sheild, any shield is really strong against magic. Also, kept about 6-10 (4) brews in my inventory at all times.
I highly suggest using Sgs if you were to try this.