They have 2x against heavy infantry and 3x with counter infantry rifling, making them kind of overlap with cassadors.
As it is a crossbowman upgrade, it should be closer to crossbowman, which has lower multipliers. But as a rifle unit they can still benefit from counter infantry rifling (still leading to lower multipliers than skirmishers), which is basically the state militia/landwehr model.
Ports/US/Germans all have regular skirmishers, so unlike British they don’t really need to switch a non-skirmisher unit into a skirmisher.