May need to work with this one. The 6 arms is going to be tricky. using (((Six Arms))) as a positive and using (((Two Arms))), (((Three Arms))) etc. in Negative may help.
Description
You will need to ensure you put (((Six Arms))) in the positive and add (((two, three, four, five, seven, eight etc. ))) in the negative prompts to force this to come out with 6 arms. Multiple runs are needed. I was able to get 2 out of 6 to have the right number. You can also use this mixed with other LoRA's to have multiple arms.