As you can see you trade about 200 attack and 350 crit damage for 2% AS 1% crit 10% armour break but at a fraction of the cost as well. Personally as Haru the 2% AS is not going towards much and 1% crit/10% armour break is much less than the raw extra damage too.
This is from a pretty mediocre glacial set (5% AS on both earrings and amulets 400 crit damage glacial ring and 3% crit energy ring)
Saying " 10% armour break is much less than the raw extra damage " means you really had no idea how important armor break is, rite ? Beside critical rate, critical damage and min/max damage, armor break is 1 of the most needed factor to become a good dps. Imagine the boss has 10k def, and 10% armour break means the boss now has only 9k def when taking your attacks. Try to google a Soul Worker damage formula, then put in the numbers. You will see a huge difference in damage dealing when you have that " 10% armor break raw extra damage " .