How does Tetherys' ability (redirect your shot after seeing the die roll) interact with the archer ability that allows to shot from an adjacent square ?
Can tetherys decide from which square she fires after sseong the dice ?
Since deciding the target is step 1 in the combat mechanism and confirming LOS is step 2 in the combat mechanism, if she gets to change target then by definition she must redraw LOS. If she is redrawing LOS I can see no reason why she cannot redraw it from a new location - she has gone further back in the combat mechanism and should no longer be held to 'old choices' when redoing the combat mechanism after the point she gets to restart at (even though she is stuck with the dice roll and not completely redoing the whole mechanism).
Choosing a (valid) target after all does require assessing LOS, so rechoosing a (valid) target logically includes reassessing LOS capabilities.
It isn't clear and explicit, but IMO she can decide where she fires from after seeing the dice.