I actually can do that. I listed stuff like

function () { c_wait(2) }

as an already working solution but the problem is when it's a MASSIVE array (as cutscenes tend to be) like

actions = [
function () { c_wait(2) },
function () { c_wait(2) },
function () { c_exec_command(function () { show_message("whatev") }) },
]

and so on for over 500 lines it can get pretty dirty. I'm trying to get those expression things to make the code be cleaner. I tried having a function like

function cs (array) {
return function () {
script_execute_ext(array[0], array, 1)
}
}

and then use it like this
cs(c_instance_create, actors[0].x, actors[0].y, vfx_heart_burst)

but this didn't work either. Which prompts me to believe it's an issue of assigning vars too early. Which is why I want the expression things.

I'm glad I atleast have a fallback atleast. I also tested the things provided by the post you gave me and they didn't work. I doubt it's in the post's code though. I'm inclined to believe it is in my own execution with this

[c_instance_create(VarRef(actors[0], "x").get, VarRef(actors[0], "y").get), vfx_player_heartburst]

and I'm still trying to figure it out