Just don't do it. You would rather just go to the GM event each week and hope for him in the random dragon egg.
It is all depending on your VIP Level, because you get more available dailies every day.
Let's say you are VIP Level 10. Then you will get 20 Dailies each day, which means 200 Dragon insignias per Day. Then you would have to farm dailies for 2500 days.
If you're really eager to farm dailies, you can go on two islands (and have points between 500 and 999)per day and get an additional 200 insignias, which would halve the time.
This is of course without any reset tickets. I think you get 4 of these each month for free, but I'm not sure right now....