Your "comref suite" should consist of the unofficial comref, which is old and out of date now but still useful; the online comref, which has many helpful comments; and an offline version if you want.
This
Action list is the best we've got for Actions ... it is still not complete.
The commands engineOn and isEngineOn were added in v1.90 and BIS have not released a comref since then: the last version was 1.85 which is why these commands tend not to appear. I've nudged the relevant people to see if we can get the online version updated.
Complete listing AFAIK of stuff that is not in the online comref but should be:-
(1.91 - New: New scripting function typeOf <object> ) - Already included.
1.90 - New: MP: Added #debug checkfile command
1.90 - Added: functions isEngineOn, engineOn
1.88 - Added: Dedicated server command #debug (userInfo)
1.87 - Added: Dedicated server command #debug (console, totalSent, userSent)
1.86 - Added: function sideLogic
Oh and
Welcome to the forum!