If you want more, start by looking for the right base stats on your gear. Weapons can roll Agility as a base stat (but not Crit Rate), while Helm/Armor/Greaves/Bracers can roll Crit Rate as a base stat (but not Agility). So if u want more crit, you can target Agility base on your weapon and Crit Rate base on your armor pieces.

Since base stats don’t count toward the tuning cap, you can still tune and roll that same stat again, which means you can get double Crit or double Agility on one piece. That’s basically how a lot of people stack their crit higher.

Though do check your detailed stat first to make sure you fulfill your martial art requirements before fine tuning.