The “First Strike” skill is missing from the armor filter, so I would like to request its addition.
Note: “Double Impact,” which was added later, is already included, so it seems “First Strike” has been overlooked.
The “First Strike” skill is not present in the armor filter.
As a prerequisite, the game is designed so that if you don’t have the assigned armor, it won’t even appear as an option. Do you own at least one “First to Strike” item? If not, that might be the cause.
It won’t appear as a candidate unless you enable “Include Drift Slot Skills”.