Both the Ottoman and Safavid empires used slave labor as well as training them in order to serve in their militaries. As for the Safavid empire, religion was used more as a way to unite the nation rather than having religious influence on the government like the Ottomans. The Mughal empire was more tolerant, with both Hinduism and Islam playing a large role in their rise to power.
The Safavid empire used bargaining, such as giving the Qiziblash people land in return for troops.
The Mughal empire, which was located in India, was