Glass Fibre is best... period.
Not sure if that was even under consideration here... but, no matter HOW FAR you want to transport energy, it will always be more efficient to use fiber cable with HV, than to use HV cable with EV. You would lose the entire EV packet (2048 EUs) over an HV cable before fiber cable would lose even 12.5% of it's load.
When is it best to use EV? I have no idea... maybe if you want to overload your mass fab it'd be the best attempt at it. Other than that, no clue.