REWARDS - Respect, $15,000, Boat School unlocks
Triads will arrive and they're heading for the roof, with the only problem being that T-Bone has men on the roof. Hurry up and snipe the guards on the roof from your current location. There are 3 men on the right side and 3 more on the left side. Do it quickly. After, T-Bone and Ryder will arrive, then Toreno will shortly arrive by chopper after.
You will need to find T-Bone and kill him. Descend from the roof, making sure that Cesar follows you. An easy way to find and kill T-Bone is to go around the side of the pier to the back. Going this way will avoid a long and hard battle with gunmen. Once you kill T-Bone, a cutscene occurs. After that, Ryder will jump into the water and you'll need to chase him. Jump over the railing and into the water. Follow Ryder to the boats, getting into the rear one (Ryder takes the front one). Do drive-bys on Ryder's boat until it explodes, ending the mission.