So a friend in discord suggested that maybe the flames that cover the map when omen ults show where he is in some way, I think I confirmed it with some ingame clips

https://lowkey.gg/v/e909acb2-93de-4532-bc18-9e8b03bf936b

https://lowkey.gg/v/0bd6e5bd-2fff-448c-aa09-6493e5dc6a0b

https://lowkey.gg/v/dd22ecda-f507-4327-a40d-491718042caf

Im still unsure if this is 100% accurate but for me it seems to be

Also the flames seem to blow away from the location omen tps to

thanks for u/robinson63 for the clarification "Doesn't work. It points to where you last looked."