Share your opinion for these following ad networks

Hello friends,

I have bit confusion between Galaksion, clickadu and trafficstars ad network.. could you please share your reviews...

1. Which vertical and modal is highly performed there ..
2. Can we run nutra offers there
3. What is top converting GEO's
4. What score you guys will give to all network base on your experience... exp: 10/10

Hope you guys give honest reply