Yes, and have 0 players in your server. :)
Anyways, 7.3 is out with these var commands and other stuff, so you can try and tell me if you were able to make your mod with this.
Also, I made this assists-as-hp thing and works fine:
init.txt:
var_add health 2
(As a global variable, since it's only used as temporary, no need one for every player)
events.txt:
event_alive 'var_set health $hp;var_set health *100;var_conv health;cevent hpassists $n;var_conv health'
event_custom $ename:hpassists 'assists $n $health'
event_die 'assists $n 0'