Attacking NPC

I found this list of Horseback and archery level combinations in another forum (post by Lynnore). So far, it seems to be accurate...at least as far as I have experienced and heard our alliance members talking about.

ATTACKING
Attacking low lvl NPC cities are mainly for resource and gold, this is done with ballistas to achieve 0 loses. The maximum level without loses is level 5, level 6 or more have trebuchets so you will always suffer losses there.
But there are ARCHER TOWERS... so you need specific tech level of archery and Horseback Riding (HBR).

Archery 08 / HBR 03 (Massive losses due to being in tower range)
Archery 08 / HBR 04 (Smalls losses from units but @ tower safe range)
Archery 08 / HBR 05 (0 Losses )
Archery 08 / HBR 06 (0 Losses )
Archery 08 / HBR 07 ( Small losses )
Archery 08 / HBR 08 (Massive losses due to being in tower range)
Archery 08 / HBR 09 (Massive losses due to being in tower range.)

Archery 09 / HBR 01 (Small losses from units but @ tower safe range)
Archery 09 / HBR 02 (0 Losses when using over 575 ballistas )
Archery 09 / HBR 03 (0 Losses )
Archery 09 / HBR 05 (Small losses from units but @ tower safe range)
Archery 09 / HBR 06 (Small losses from units but @ tower safe range)
Archery 09 / HBR 07 (Small losses from units @ tower safe range)
Archery 09 / HBR 08 (0 Losses )
Archery 09 / HBR 09 (0 Losses )


Archery 10 / HBR 0 (0 Losses )
Archery 10 / HBR 05 (0 Losses )
Archery 10 / HBR 06 (0 Losses )
Archery 10 / HBR 07 (0 Losses )
Archery 10 / HBR 08 (0 Losses )
Archery 10 / HBR 09 (0 Losses )
Archery 10 / HBR 10 (0 Losses )

(copied from syoganai1111 thanks)