D&D 5E What is a good 5e build for a 'Sniper'

[generic]

Okay, after some feedback, I've resolved that my goal is just to maximize the damage of one shot (for flavor), not necessarily get a one-shot kill. I still think sneaking, Rogue, and crit-fishing are important, and Ranger might be important (especially for getting both Gloom Stalker and an extra attack, as well as some cool spells for use in combat.

 

[Esker]

Here's a crazy idea: Tempest Cleric 2 / Gloomstalker 9 / Assassin 9. Use lightning arrow. All damage, including sneak attack, becomes lightning damage, and therefore eligible for destructive wrath. At level 20 with sharpshooter and a crit, you get 10d8+10d6+15, which is 155 when using destructive wrath. Still not one-shotting anything at that level, but it beats the pants off of Assassin 20 for single shot burst damage.

 

[generic]

Here's a crazy idea: Tempest Cleric 2 / Gloomstalker 9 / Assassin 9. Use lightning arrow. All damage, including sneak attack, becomes lightning damage, and therefore eligible for destructive wrath. At level 20 with sharpshooter and a crit, you get 10d8+10d6+15, which is 155 when using destructive wrath. Still not one-shotting anything at that level, but it beats the pants off of Assassin 20 for single shot burst damage.

Thanks! It's still a pretty sweet build at lower levels, I might try it.