You don't need to pin. The key to remember is this.. the futuwwas, nizaris, the janissary infantry and even the jan archers and turcomans can beat almost any other unit 1 on 1, if they're able to offload their supply of arrows first, then rush in and clean up what's left. JHI provide a premiere anti-cavalry unit that can outrun any infantry heavy enough to beat it. Think on the implications of that for a moment.

Divide them, piss on them with arrows, avoid close combat, then engage them hand to hand and you have an easy win, with few casualties. I tend to lose very few men when playing Turkish campaigns, except when I'm fighting other Muslims (predictably) as they tend to be heavy on hybrids too. While you could out-skirmish another skirmish-heavy faction, it's just giving them an unecessary chance - like trying to out-horde the horde. From an efficiency point of view, why risk it? Put polearms in the woods of Khazar, leave the computer on and come back in two hours.