Nice idea, you could even simplify it further by including the /set command within the /scon:

Code:
    tokenize 59 $1-
    var %a
    echo -t 4STATUS reply @ #Idle-RPG:
    scon -r inc $(%a |,) set $(%idlerpg_ $+ %a,) $* $(|) echo -t -> $*


Guess you also need to be sure that the bot will never message anything that would exploit /scon's re-evaluating behavior