Run the Table (Silver) - Defeat enemies with a stealth attack, melee attack, headshot, and explosives, in that order, in 15 seconds
As the trophy description says, you need to defeat enemies with a stealth attack, melee attack, headshot and explosives in that order and all within 15 seconds. Any encounter that begins with you in stealth is ideal for this, but there are two specific encounters (both featured in the above video) that are perfect for this.
The first encounter is in Chapter 8 (Bridge) and begins with you dropping down to stealth kill an enemy. From here, you can simply fire your weapon towards the ground to alert the two enemies walking just ahead of you, then melee the one and headshot the other. If you have beaten the game already, the Bullet Speed cheat will slow the game down so you can headshot the enemy easily. After the headshot, you'll need to toss some dynamite straight ahead to try and catch one of the enemies running towards you in its explosion.
The other encounter occurs during Chapter 10 (Drawbridge) and might work easier for you. If you go to the side shown in the video, you will likely catch three enemies coming around the corner, so you can easily stealth the first, melee the second and try to headshot the third if he's running away or climbing the structure. From there, you will find a sniper on the same structure, as well as an explosive barrel. Try to move back and lure the sniper closer before shooting the barrel.
Check out the full guide: http://www.gamerguides.com/uncharted-4-a-thiefs-end/information
Official Site: https://www.gamerguides.com/
iTunes App: https://itunes.apple.com/us/app/gamer-guides/id599410871