Like you I really like Escrima (or Arnis, Kali, whatever it is called). Sure the stick work is not practical, but it does translate nicely into knife fighting. Of course, when you introduce a weapon into the equation, it's a whole new ball game.
My system is this (in order of priority or occurrence):
1. Run away if possible.
4. Knife (usually a small pocket knife).
5. Kicking and punching (Muay Thai).
6. Elbows and Knees (Muay Thai).
7. Chokes, armbars, leglocks (BJJ and Shooto) in combination with strikes on the ground if possible.
By the way, also like you, I recognize the limitations of grappling arts. But let me ask you this: do you really think that other arts and systems are any more useful than BJJ (with its throws and takedowns) in dealing with multiple opponents?
For to win one hundred victories in one hundred battles is not the acme of skill. To subdue the enemy without fighting is the supreme excellence. Sun Tzu