I'm sure the 6 plasma cannons on your Oblits did their fair share
My sonaofabitch deployment involved placing oblits on a ruin on different levels. minimum scatter meant the blow would fall on the below level, losing it. The aftermath saw a dead oblit. Mainly due to this dirty trick but also due to the very useful Divination power that let me reroll my Sorceror saves. he was put with the oblit in front of the unit and basically absorbed unschated 3 plasma blasts.