Well, as the author says, skirmishers aren't really skirmishers, more 'low quality light troops'.
I find they're best used as flank support. Keep them behind a combat unit and pop out to give a cheap flank bonus. this probably only works if you use the optional rules forcing a unit to fight to its front where possible.
Other than that, skirmishers really are only useful for facing other skirmishers.
The 'evade' move i think is a waste of an LP, and can only be done if the skirmisher didn't shoot.