The Hidden Blade Assassin's Creed in Depth

The memory Tainted Blood, in which you assassinate a decoy Torres and El Tiburon.

Turkey Shoot Early Death

In sequence 2 memory 2 El Tiburon first appears. Under02 originally found a way to kill him (throw a smoke bomb to make him drop his ax and use the special attack). Unfortunately it wasn't much reliable. So I looked for an improved way.

Get his attention. Be careful not to let him get close or Edward gets instant killed. Now this part is tricky because if you face the camera away from El Tiburon he disappears, even if you're in combat with him. Plus you currently have to tail a captain who is walking the opposite direction from El Tiburon. So lead him that way, towards a group of courtesans. At some point (when you have to obtain a key from the captain) his AI is no more. Just stands there and can be moved with tackle. Now for moving him into water the game won't let you tackle him off edges, so use an explosive barrel from the nearby fort.

Dead on Arrival

Kill "Torres" after he spawns in the fort. Get ahead while tailing El Tiburon and wait. Originally I wanted to stand right by the spot where he spawns, but it proved difficult with all the guards standing nearby. And yes it wasn't exactly where he appeared, but I spent so much time I figured it was close enough.

Hangman

From the highest point inside the fort you can use the rope dart on "Torres" when he passes under.

Payback

With the memory of El Tiburon's deadly ax in mind, Edward seeks one to initiate some poetic justice. The problem is trying to get an ax inside the fort. After the first memory corridor the guards inside despawn, as well as any weapons left inside. The only exception to this is my last video, in which some guards in a fight with poisoned "Torres" were still there, although I'm not sure what the chances of that happening again are. So I get an ax from a brute outside the fort. I use the exploit that removes Edward from the scene to remain undetected. This is to make things easier since this removes the distance limit to the target. And of course the ax special attack is a one hit kill on El Tiburon.

Look Out Below

The lift inside the fort is also a quick death. Just get the target to come right under and let her fly.

Noob Fight

Right after the cutscene there is a brief moment where you are anonymous. El Tiburon can be tackled and assassinated. This also works on a reload, so fighting him is no longer a challenge.