Blocker (Dragon Tears), when settled, will provide line of site to the sole entrance to our lands.
So basically OO won't be needing a spear.
We do, however, have 2 spears already in the south, but only 1 chariot.
So the question is best resolved in this manner, IMO:
Given our current units, which is a great threat to us, Kaz (with chariots) or the barb axes? If the former, build a spear, if the latter, build a chariot, and if we have enough already build the settler. Archers are IMO useless unless we are going to just leave it in blocker (only thing that gets odds on it would be a CR sword), and we have enough axes, so don't need another one of them.