I always try to get a views ratio of about 2-3:1, and it works well. Clicks are really not important, you don't need them at all.
From what I've seen with my dragons this ratio with over 1000 unique views is a guarantee of egg hatching (I usually get about 500-600 u.views by this point) and hatchie maturing both after exactly 3 days each, which is the fastest you can get. Probably less would be enough as well, but that's the number I get from Cantr Forum and
Daily Dragon Fix alone.
Edit: I've got a Sunsong from AP! *squees* my first ModMayhem dragon!
and I've accidentally snatched a 2-headed from the cave:

No need for it, so in 5 hours it will need a new home. It would be such a shame to just abandon it...

Edit2: reserved