Just set my personal best badges per day :P Could have got more but it's late maybe tomorrow I'll break it again.

Code:
Blood Furnace: 3
Ramparts: 3
Slave Pens: 3
Underbog: 4
Steam Vaults: 3
Mana Tombs: 4
Sethekk Halls: 2
Shadow Labs: 4
Mechanar: 4
Botanica: 5
-------------------
35 Badges (would have been 37 if the daily was one of the above)
If I do the above + BM / Durnholde or like Mech / Shattered Halls can bust the 40 mark easily.