what do you guys thinks about the following dit da jow recipe? is it suitable for iron palm practice, and if not, do you have any suggestions?

it calls for 12 grams of each of the following to be mixed in one gallon of rice wine or vodka.

Da huang/rhizoma rhei (rhubarb)
Zhi zi/fructus gardenia jasminoids (gardenia)
Hong hua/flos carthami tinctorii (safflower)
Huang bai/cortex phellodendri (phellodendron bark)
Ho yao/myrrha (myrrh)
Ru xiang/gummi olibanum (frankincense)
Xue jie/sanguis draconis (dragon's blood)
Lu lu tong/fructus liquidambaris taiwanianae
Dang gui wei/radix angelica sinensis (tang kuei tails)

it's from the book, "a tooth from the tiger's mouth" by tom bisio (a great book, btw).