does it possible to attack fleet in the transit ?

only when it get to planet or cords! no while it is flying

so it is not possible to set an ambush ?

yes if the see where you are going the can wait and attack when you land
if you fly from your planet terran moons can phalanx to see where your fleet is going! so better to fly from coordinates only players whith emperor can see coordinates

but almost no one can phalanxe you while you are small there are only few who has a moon with phalanxe and able to attack a 30-100k so if you care about the activity of their moon and your sending timing nothing will be bad

what I got is attack from overmind with 30 Devourer and as I have just a bit over 2100 points it seems that to win against those odds I have to do some strategic chicanery like ambush or attack from all directions . So any suggestions ?

doesnt mater loose win you get nothing out of both senarios

dont like to loose , so is there are any way to do it ?

find 500 dreads

gostaria de participar do seu grupo ou aliança como faço

cristiano yo hablo español, pero deberias hablar en ingles lo mas pronto posible para que te puedan entender... por cierto yo entiendo bien el portugues... 

OK it was interesting! Destroyed all attacking units with moles and hydralisks  

moles are good attack