What openings 100% won't die to FP on turn eight?

Lets say you open like this:
FFFFFFFF
PWPFSSSD
And your opp opens like this:
SWDSFW
PSDFFF

You can win on turn eight if you predict the target of four enchantments correctly (very unlikely).

I know that if you open like this:
WWS?
SPFP
And your opp opens like this:
FFFF
PWPFSSSD
Then you're 100% sure not to lose on turn 8.

Unless your opp sees your S opening and for some strange reason changes to:
FW
PWPFSSSD

But then on the next turn you can just:
SPSDF?
WWSPFP

So WS opening 100% won't die on turn eight to FP. Are there any other such openings?