Originally Posted by AzureWinter

At this point I am sure I could. The last 80 stamina daily I tried was for one of the manyu groups and I couldnt do it, but that was several days ago, and my team has improved significantly since then.
When should I be ready to start farming 12-3?
My lead team has a power of 39k, and the other 3 are between 23k to 29k.

What player level does it become viable at too, because I have 179 stamina right now, and I know the advance mission costs 80 stamina alone...

Player level doesn't really matter.

What's important is team power, as long as you have total 150k (with helper) you can do 80 stam daily just fine. Even better if your helper is quite strong.