Here is what BSuN2 Suggests (BSuN2 is the fastest growing alliance in Server 7- one of the Original 7 Servers!)
level 10 archery
level 8 medicine
level 9 iron working
level 9 military tradition
level 6 horseback riding
level 8 logistics
103 attack hero
at my level of logistics, 1 transporter can hold 9000 goods which is where i got the math
Code:
level 1 100 ball 25 trans 215,000 level 2 200 ball 40 trans 355,000 level 3 300 ball 134 trans 1,200,000 level 4 400 ball 252 trans 2,260,000 level 5 500 ball 445 trans 3,990,000

This sucks I send a lot lower than that and still lose nothing. What hero do you send what lvl attack and intel