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

i attack lv 5 npcs with 350 ballista and have no losses.archerly lv 10 horseback lv 8, military tradition lv 8 or 9 . cant remember. with a hero whos attack is only 60 something
I attacked a level 1 npc with 23 ballistas and lv6 archery and lv3 HBR and had no losses at all…
lv6… just send 10k ballistae and it should work
i lost to a lvl 5 npc with 500 ballistas and 900 transporters archery=7 horsbackriding=8 i lost 2k prestige what did i do wrong
When HBR is Greater than Archery you are running underneath your own arrows. Build up archery first – get it to lvl 10. At lvl 10 Archery and HBR all is well with the world
you need to have hbr at 9 and arch at 10