I don't need all of the seals on my extra toons. I only need them really on Arlassa for the purpose of buying mounts. I've finished all of the lower ones (The sword ones, etc), so I have access to only the final dailies.

I do them on all of my team except any collection ones. It varies from day to day, but I only do the joustin one on Arlassa, as well as the Egg/Leg/shark dailies. The Kobold one counts for all toons, so I will box that. I end to Storm Peaks to do the frosthold daily, anyway, so I don't mind taking the detour out there for a few of the dailies.

This generally means that Arlassa gets 10 a day, and the other toons get 7-9 a day. And seeing as how I really only need the seals for mounts and possibly other heirlooms down the road, I'm okay sacrificing those 1-3 other seals for saving time to do other things.

It really just depends on how bad you need the seals.