Focus on naoe's assassin tree to unlock chain kills starting with double assassination at knowledge rank 2, which needs the tanto equipped and some early skills like ground assassinate. Tag enemies with eagle vision first, then keep an eye on their health bars to plan your chain attacks.

For the best setup, explore areas marked in orange on the map to boost your knowledge rank through meditation spots and lost pages, which unlocks better skills over time. Smart to upgrade assassination damage early, and maybe interesting to know that hand of the creed helps prevent stronger enemies from resisting your kills.

Always check the visibility meter since shadows and stance really matter, and remember that smoke bombs make great distractions when you need to reposition. If youre having trouble with tougher enemies blocking assassinations, theres actually a guaranteed assassination toggle in the settings, though getting the proper skills is more rewarding in the long run. Watch for patrol patterns and use your shinobi tools to take out lights or create openings, especially when dealing with multiple targets.