Sheol Gaol: Accuracy Values

My group has been running these lately, and I have been wondering how much accuracy others are shooting for. It would be cool to get a list for every NM at every stage, but I feel like V15 and upwards, especially T3s and Bumba, should come first.

BGwiki suggests accuracy values for some, like V20 Xevioso is ~1,375, and the others are ~1,241. Ongo suggests stone spell accuracy of ~1,365. Does this change for each tier? And if so, how much does it change? Thanks for any information.