[SickAttack]

You should use global timers if the matter isn't relatively dependable on a player or if you need to do something to a certain group of players (not a close-near repeatable timer, but needed to do something to the group in an interval). Otherwise, if a the timer focuses on a player and is repeatable, consider using per-player timers. However, there might be cases where the above doesn't apply.

The less code to execute in the interval, the better.