I don't really put a lot of work into those timer presets either. By "nature" mobs will not cast spells 100% predictably and if they do at one point, as your raids starts to overpower the mob over the months, they will cast them less often due to whatever. Casting speed debuffs, interrupts at the right time... whatever. I usually keep a mental memory of timers and if I need to call them early or later than I have listed... I don't bother to edit the timers themselves because I don't care.
Then something like this comes along, and it always will so whatever, people wanting timer presets. Honestly I only ever put them up there was so that if people lost their settings, they would not have to start from scratch. They are not there as a cheat sheet... and that's why I rarely update it.
There was recently a discussion on making a spell timer here:
http://www.eq2flames.com/general-act...ate-timer.html