SC2Mapster

Event: Dialog - Any Dialog Item is used by Player Any Player with event type Clicked
Actions: Your Actions...

In your Action Triggering Unit doesent work because there is NO Unit that triggers the Dialog item only the Player can use Dialogitems :) So you need to specify your Unit with a Variable or directly. And replace the "Triggering Unit" with the UnitVar or the Unit itself:)

When i think about it it could be easier done without Variables

Event: Unit enters Region X
Condition: NULL
Action:
IF(Unittype of Triggerin Unit == Space-Marine) OR (Unitype of Triggerin Unit == Berserk)
      THEN (Pick every Unit in Region X) 
                IF(Picked Unit Unitype == Space-Marine AND (Picked Unit Unitype == Berserk) 
                    THEN(Remove Picked Unit)

This could be working too BUT it is much more unspecific so every time a Unit enters the Region it checks the Unitype is one of the Unitype Space-Marine or Berserk then it Picks every Unit in Region X and only if both Unitypes are in the Region then only both Types getting deleted.

In Theory you move one Space-Marine in the Region it checks nothing happens. you move the second Marine in nothing Happens you move a Berserk in Both Spacemarine and the Berserk get deleted.

Did you try to make an OR condition? plus 2 variables?

UnitOne (UnitVar) UnitTwo(UnitVar)

CONDITION 1 (UnitType of Triggering Unit == Space-Marine) OR CONDITION 2 (Unitype of Triggerin Unit == Berserk)

So both can actually be TRIGGERIN UNIT.

IF (Triggering Unit == Spacemarine )THEN( set UnitOne == Triggering Unit )ELSE nothing

IF (Triggering Unit == Berserk )THEN( set UnitTwo == Triggering Unit )ELSE nothing

i dont know ig thats works but then you can make a "Wait until condition"-action to check if both Unitypes are in the Region.

WAIT UNTIL CONDTION1 (UnitOne is in Region X) AND CONDTION2 (UnitTwo is in Region X)

Remove UnitOne Remove UnitTwo

I Dont really know if thats could work but i think it is a start :)