So... the turn order is...
Backstabs (17 INI)
Zombies (14 INI)
Trey (13 INI)
Deravan (11 INI)
R'lyeh (10 INI)
Dorisma (7 INI)
Robert (6 INI)

I will be editing my post regarding the zombies' and Backstabs' attacks.

Yikes... well, that luck is a cruel mistress.
Backstab's hit roll: 8 + 6 (from AGI)
Zombie's dodge roll: 16 + 1 (From LUCK)

And then...
Zombie's hit roll: FRIGGIN' 20!
My dodge roll: 6... -_-'
Damage roll: N/A
Damage dealt: 14
NOTE: From my character's previous chest injury, my max HP has been reduced to 13, so, I'm at -1, rather than 1, at the moment.