Yeah i've done subsequent attacks successfully with 5k warriors, but it only takes loyalty down by 1, so you do less attacks.. So i settled with 10k war, 5k archers. I think it can definitely be optimized further.

My losses on 92k archers, 8k workers (gives me a 100mile range), was 40k archers lost. hefty price to pay but worth it for the war we were fighting. Hero ATK = 192.

Losses range, depending on what you send, and how you send it. But it's a lot less than the conventional method. Since you beat the refresh, and subsequent waves, you lose less archers to rock fall if you just send in warriors (cheaper)