@Teralitha, which is why it doesn't take 30 shields, it takes less than that, plus power.
EDIT: Since I'm assuming you won't do the math, 70k mass would get you 3 T3 pgens (3240 mass each giving you 7.5k power) and 25 T3 shields (needing exactly 7.5k power)
So... my point still stands. Unless you had 25 T3 shields, and still lost. Did you?
@Nex, yes, the attacker always wins. Otherwise FAF would be a turtlefest—there would be no point in attacking. People would just shield creep. Which would be quite funny, I'd love to see a map covered in shields, but probably only funny watching it when someone else does it, and only the first time.