I have generally 560 Naq in repair costs per hit (Goa'uld with 5 attack weapons).
Usually, I get around 10k when I hit an account with 11-12k in the open. That's 9k profit. Per hit.
As for leveling a defence? I leveled a 2.5k def with 650 strike power in 26 attacks. (Now I'll admit that the player was offline and such, still..) 26 * 15AT is pretty expensive.
I don't think you should look at massing/attacking as expensive in naq, but in AT. Then again, it's early, and I am making plenty mistakes in my reasoning.






