Which I think means too - however many trained ones are still around, hoping to die and get the virgins: it will take in any next.. lots more armament than knives, to do this even once more (?)
But as several have noted, the best next tactic would be - something completely different [no pun intended]. I wouldn't even want to mention.. the many obvious, diabolical acts possible. (And I hope some ninny website doesn't start doing such, to show how clever the author is. Stifle it.)
A.