age2 is different to age1 in respect that you scout the npc10 for a favorable hero, it does not work, the hero always changes.

you really want leadership at 90-100 to farm npc10's with reasonable losses. depending on your hero gear and star levels you should be looking at losing 1.5k-8k archers per hit. i personally lose from 4k-7k archers per hit and my gear and star levels are not the best. i never lose more than this, ever.

read up a bit on leadership and you will understand a bit more the differances between age1 and age2 heros.