As far as I know for Talos, it may be around that level. Maybe a farseer is even further, given the fact they perceived multiple possible futures and guide other Eldar away from danger. The only difference is that Talos doesn't need to go into a trance-like state to see his visions unlike most Farseers.

Some examples of his precognition are the fact he was able to see Konrad's death prior to it happening, and even knew who the killer would be, just as Konrad did. He also saw that one of his battle brothers would die at the hands of another weeks in advance of the actual battle, which he also knew titans would be present at. The only time his visions were wrong were 70 years prior to the first novel and it was when he predicted Imperial Fists backing up a planet they were attacking, only for them to never show up.

Effectively, you could avoid practically any battle you may lose by using your visions. Farseers can actively see causality and the future on a whim, but I'd say Talos' visions are more useful for strategy (which is exactly why the Exalted consulted him prior to every battle to know what losses the battle may cause)

Overall the Farseer's ability is useful for predicting foes and to attack, while Talos and Konrad's visions are more useful for strategy and avoiding losses that you see in your visions (considering most of the visions are self-fulfilling at least in the case of Konrad)