It's not really about syncing two things(I never said I needed to set two timers, I said I didn't want to), it's about being able to trigger the clientside right before it's destroyed on the serverside. I have a bomb that needs to be destroyed on the serverside, but I need to do some clientside stuff as soon as it's destroyed.
I could use some sort of 'global' timer to compare the clientside and serverside, but that would require checking them in a loop.
PS. Timevar3, as far as I know, isn't released on GS2 yet.