Assassin

This is the most common Assassin route for steady PvM damage. It leans on the class bonus of doubled critical rate when using Katar weapons, then stacks pressure through Katar Mastery and burst from Sonic Blow.

The stat spread is very close to dual-dagger play, but this route favors critical-focused gear, easier general-purpose farming, and fewer weapon swaps while leveling.

This route uses a high-ATK katar together with gear that grants Sidewinder Card or Chick Hat so your learned Thief Double Attack can apply while you stay on a katar. On AoY, those Double Attack procs can also crit, which gives the setup better upside than older iRO expectations.

It is a higher-investment alternative that rewards stronger weapon ATK and faster general farming, but it is usually less straightforward than the standard critical setup.

Dual-dagger Assassin is the fast leveling route if you want to tailor right-hand and left-hand weapons to the target. The usual pattern is a stronger right-hand dagger like Gladius [3], Damascus, or Ice Pick plus a heavily carded left-hand Main Gauche [4].

This route clears fast on the right target and is especially strong against higher-defense monsters, but it asks for more matchup knowledge and more weapon maintenance than katar play.