When you get five or six Manjaniq toggled to incendiary shots, they do massive damage to any unit. But Ottomans can deal with it using their best horsemen, which tank the shots and take down siege with relative ease.

Sipahi are just as effective as Camel Lancers DPS-wise.

Crossbows, especially with the Mehter buff, are quite competitive even up against archers. Same range, but with the attack speed and more damage, they actually trade quite nicely.

Imams can't heal themselves and move really slow, while the dervish is much faster and can heal itself.

If you have four or five Manjaniq, everything the Ottoman has falls apart. With many Janissaries, you cannot make any more cavalry units. Your best bet is a ranged mass with the Manjaniq and then a bunch of spears of your own. Spears would be your play with Manjaniq.