I believe it's been, oh, five or more years since I painted any Eastern Woodland Indians, and I really can't remember what I used. I do know, however, that the best source I have found for colors, patterns, and tattoos is the prolific historical art work of Robert Griffing. I have 58 images posted here:
https://www.flickr.com/photos/92083398@N08/albums/72157632476820676 I have used Citadel Mephiston Red for other purposes, and I think it would do nicely for war paint. From what I've seen of Liquitex Red Oxide, it would be fine as well. For what it's worth, the only colors Griffing shows for his Eastern Woodland Indians are red and black. Other tribes (southern, western, plains, Great Lakes) may certainly vary. I would only suggest that any colors used for war paint be thinned a bit. You can see the effect in Griffing's paintings.
As always, go with what looks good to you!