These are scoreboards:
![scoreboard example](https://i.stack.imgur.com/6PtFK.png)
FFA and Sandbox
There are many parts to a scoreboard. The below is a scoreboard from a typical FFA game, but all of these rules apply to Sandbox mode as well.
![Typical FFA scoreboard](https://i.stack.imgur.com/SwhK0.png)
There are far more than 10 players playing on that FFA server, but the scoreboard only displays the top 10 people. At the top would be the player a savage.
with 195.6 thousand points, shown next to their name. They are playing as a Spike, which can be seen at the end of their progress bar.
The progress bar compares the other people on the leaderboard to the top person. {❂} haykam
, having 7.5k score, has an about 3.83% filled progress bar. Ninja with 136.2k score has a progress bar filled to about 69.6%.
2 Teams and 4 Teams
In Team Deathmatch of both 2 Teams and 4 Teams variants, the background color is not a mint green. Instead, it is the same color as the team the player is on. Otherwise, the rules are the same as FFA/Sandbox.
![Team gamemode leaderboards](https://i.stack.imgur.com/aucSJ.png)
[MG]SNIPEpro
(a Necromancer) is on team red, while necromancer
(a Necromancer) and :0
(a Battleship) are on team blue.
![The two blues from before](https://i.stack.imgur.com/TBmFL.png)
Tag
In Tag, the scoreboard counts the number of players in each of the 4 teams (on mobile diep.io, there are only 2 teams) with their colors as the background.
![Tag leaderboard](https://i.stack.imgur.com/DdBuu.png)
In this Tag example, there are 20 players on green, 10 on blue, 5 on red, and 3 on purple.
Domination
On Domination, there is no leaderboard.
![Proof that there is no leaderboard on Domination](https://i.stack.imgur.com/FSjlz.png)
From the Diep.io Wikia page on Stats:
- Ranger
- Assassin, Stalker (this tier is slightly bigger than the Hunter tank)
- Hunter, Streamliner, Predator*
- Tied between different branches:
- Sniper
- Overseer branch (Overseer, Overlord, Necromancer, Manager, Overtrapper, Battleship, and Factory)
- Trapper branch (Trapper, Tri-Trapper, Gunner Trapper, Mega Trapper, Overtrapper, and Auto Trapper)
- Smasher branch (Smasher, Landmine, Auto Smasher, and Spike)
- All other tanks.
The Predator has a special ability that allows the camera to move away from the tank, allowing it to see further than its normal FOV could hold. Not all is visible at once, however.
Conclusion
If we use raw FOV (without camera-shifting), you're looking for the Ranger.
![Ranger FOV](https://i.stack.imgur.com/VCHGt.png)
Including camera-shifting, the Predator has the most FOV, as you can see almost one screen more in every direction, although not all at once.
![Predator camera-shifting FOV](https://i.stack.imgur.com/b9ZCN.png)
Best Answer
Not definitive, but as mentioned on the wiki
Note that Tank->Twin is light blue, and adds an forward extra barrel, while Machine Gun->Gunner has a similar effect, but in a different color.
It is interesting that tanks which appear in multiple paths (Twin Flank and Quad Tank) have the same color both times, but they have been placed in the same order to keep the pattern.
Image below for observing the tank pattern.