Q on Potential Stats

At a boss, most NLs will have something like 120+30+100 atk (30 stars, 100 pots)

So:
+1 wa is 0.4% increase
+1% wa is 0.48% increase
+1% total damage is 1% increase
+1% boss damage is 1% increase

But you gain them in different quantities:
level/10
job
job
30% flat

Eg. a level 120 item will get
+6/12 w.atk
+3/6% wa
+3/6% total damage
+30% boss damage

So they rank
boss damage
total damage
w.atk
w.atk %
On the other hand, if you have +12 +6 +6 w.atk that's very decent too.