A little trigger problem...

Well, I can't seem to tie trigger enhancement to abilities that target points like shockwave and impale.

I use 'Unit Begins casting an ability' event, 'Ability being cast equals' condition. What should I use?

(target point of issued order) is an event response for A unit is issued an order targetting a point it won't work for all the ability events

try this
E: An unit is issued an order targetting a point
C: ((issued order) equal to Order(shockwave)
A: set Point = (target point of issued ordeR)

you need a point variable called "Point" then pick the trigger you posted and replace (target point of issued order) with "Point"

I already used that to create a unit group variable. Shoul I use it again for the actual enhancement?

Is it posible to affect units between the caster and the target point all within the same range as shockwave (150)? I think ranges create a circular area while region create squares and rectangles.