It matter not at all if distance or time is a constraint. It matters not at all if the space aliens can traverse the entire visible universe or beyond in an instant. Best assume they can. It matter not at all how many dimensions there are, let an infinite number be as is done in thermodynamics.
I await a 50-150 line elaborated summary.
Shadow boxing cryptic puffs of theoretical pontification is fast running thin as an interesting recreation.
I'm aware of the major theories in the field, BTW.