Post 19 Bonus

The only Class-specific bonus Rogues appear to get post 19 is an increase to their Alert Combat bonus.

At level 19 the alert combat bonus with Steel Backsword (which itself gave +19 parry/riposte) and secondary a Sharp Butcher's Knife was +122 Parry, +47 Riposte. At level 20 the alert combat bonus was +134 Parry, +50 Riposte. Note that the base parry and riposte both went up by 20 due to character level (any class with Parry/Riposte experiences this) and the bonus from Steel Backsword went up by 1 to +20/+20. So the increase from 19 to 20 was +12 parry and +3 riposte. It is unknown if part of that increase is simply due to the base parry/riposte increasing; mid 30 level up should prove that.