You keep using that word. I do not think it means what you think it means.
Ahhh....my misspent youth...
That works. It is thematic.
For me, in that situation I move my fleet as if I am another player who is playing against me. I know, however, that some people don't like to do that in solo play and want the game to decide the enemy's play for them. I'm okay with using the die roll.