I get Scripts from 10's all the time. I also attach 2k warriors to my level 5 farming runs for the xp boost, which gains me scripts from level 5's. On average i get prolly 7 or 8 of them a week. These results are server 3 and I play no other servers to compare results, so not sure if these numbers would happen on other servers.

P.S. This is also thousands of attacks a week so happy hunting and good luck.... Free play is completely viable