Problems with the Locust skill

I used the Locust skill that makes a unit unselectable and untargetable on some summoned units. However, not everything works out as I hoped.

1. I had a summon with Immolation and the Locust skill, but Immolation does not work then. Is there a way to get it working?

2. I have written some triggers to issue orders to the summons that cannot be selected. My problem is that I cannot find a way to detect if an enemy is in a certain range and use this as a condition. I can use it in an action as follows:
Unit - Order (SummonedUnit1) to Attack (Random unit from (Units within 512.00 of (Position of SummonedUnit1) matching ((Owner of (Triggering unit)) Equal to Player 2 (Blue))))
but I need it as a condition. This is probably easy, but I seems to have a mental block on this :knife:

what exactly do you mean? what are you trying to do?

edit: i get it never mind. trigger would look like this

hm i forget exactly how it looks bnut it is an event not a condition.