I want to beat mass of unit of Skirmishers (elite ofcourse). At least 50 skirmishers
how?

really?

pretty much any unit in the game other than archer will rape skirmishers.

a couple mangonel will wipe em. 10 knights or 20 light cav. infantry works apart from pike line.

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if opponent has huge skirm mass with less halbs just hussars can do
if he's mixed with good number of halbs, it's time to make champs / any infantry uu

gg eles Hit and run

send 2 eagle or huskarl upgrade on, and gg!

Cavalry units are the chosen !

send 1 paladin frankish all upgraded paladin or a william wallace

Facepalm x1000000

Mangonel

send some crossbown or mangudai to kill them

Skirmishers are the weakest unit in the whole game. Massed Skirmishers will be trouble only for thrash infantary and archers, any calvary will do very well against them. If you want to rape a group of Skirmishers, just use Onager. Onager kills Skirmishers in one hit.

1 siege onger in rm would wipe them out in no time

u make skirmishers too