Oh? Everything I've seen says that for physical damage sharp eyes is an additive 140% onto the attack skill %, so the damage increase depends on how strong your attack is.
Oops I was wrong, +140% before multiplier is correct, x2 thing is probably from another game and I was dumb LOL
Crit damage is additive, with SE triple throw hits 390% and avenger is at 420% which is barely higher. But the TT damage formula is much stronger with LUK*5 instead of luk*3.6
avenger is decent in third job when it's being compared to lucky seven, but falls off hard in 4th job