Edge is the ultimate in metagaming, but I think it is intended that way. In my other game that died recently, it looks like the proximate cause for the game dying was an argument between one of the GMs and a player about Edge. The GM wasn't revealing how many hits our opponents were getting, so we really had no clue whether it was worth it to spend Edge in the first place.
It is an interesting question. I think there are two types of ways to play it.
One is total awareness of all hits. This allows maximum use of Edge and is easiest on the players (which is what I do)
No awareness of enemy hits - this forces players to say something like, I only got 3 hits. Is that enough, maybe I need more... - but I think that penalizes the players too much.
In any event, let's reroll:
15d6.hits(5)=2
Ok, not very good
First we'll have him actually make the test:
10d6.hits(5)=6 His successes are reduced to 4 by the handling of the vehicle, but he only needed 3 hits to make the test. However, now let's see what, if anything, the spirit's Accident Power has on him.
Spirit rolls Magic + Willpower of 8 vs Stinger's Reaction + Intuition of 10.
Cynthia:
8d6.hits(5)=3
Stinger
10d6.hits(5)=3
Unfortunately since Stinger got the same number of successes, the Accident power has no effect.
This means that basically Grease tries to cut the car off, but Stinger manages to swerve just in time.
What is plan B?