What Tier VI's 3:1 skill level?

I'm trying to plan a dragon crafter scale set, but I'm missing the rather vital information on what they changed 3:1 skill to from the old 1467 value. My best guess so far is that it's somewhere between 1200 and 1300, but that a bit to big a range?

Is 3:1 always 50% between min and optimal?

That would make it 1288 or 1287 depending on how they round.

No, the divides appear at equal intervals between min & max, so it depends on what efficiency is minimum. Working adamantium bars, for example, 5:1 is 1100, 2:1 is 1425, so 4:1 is would be the 1/3 mark (1209) and 3:1 would be at the 2/3 mark (1317).

Not sure what the range is for scales stuff.