The defaults below, including the [CombatTrainer], are to be pasted into your GameUserSettings.ini file at the bottom. From there, they can be adjusted.

The default location of this file in your Steam folder for Single Player is
\Steam\steamapps\common\ARK\ShooterGame\Saved\Config\WindowsNoEditor

The default location of this file in your Steam folder for Servers is
\Steam\steamapps\common\ARK\ShooterGame\Saved\Config\WindowsServer
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Defaults:

[CombatTrainer]
TierKills=100
StatMultiplier=0.25
RankUpEffect=True
AuraSize=0.4
DestroyerBonus=1.5
LeaderboardOnly=False
CounterDefaultOn=True
WildSpawns=True
SpawnRate=20
RankedLoot=True
DestroyerTimer=60
DestroyerSpawns=True
DestroyerStats=20
DestroyerTier=20
LeaderboardKey=2
AdminOnlyLeaderboard=False
DestroyerNumber=3
WildBlacklist=
DestroyerBlacklist=
TamedBlacklist=
KillBlacklist=
TamedWhitelist=

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TierKills = How many kills are required for each Rank Up.
---Default = 100, Minimum = 50, Maximum = Infinite.

StatMultiplier = The % increase to stats for each Rank.
---Default = 0.25 (25%), Minimum = 0.0 (0%), Maximum = 1.0 (100%).

AuraSize = The scale of the glowing aura attached to your Tame.
---Default = 0.4 (40%), Minimum = 0.0 (0%), Maximum = 1.0 (100%).

RankUpEffect = Whether or not to show the bright flash on Rank Up.
---Default = True. Minimum = False, Maximum = True.

DestroyerBonus = The bonus Destroyer receives beyond a normal Rank Up.
---Default = 1.5(150%), Minimum = 1.0(100%), Maximum = 2.0(200%)

LeaderboardOnly = Whether or not to disable the ranking system.
---Default = False. Minimum = False, Maximum = True.

CounterDefaultOn = Whether the kill counter is on by default or off. True=On.
-By setting this to false, the only way you will see the kill counter is by pressing Shift+F1.
---Default = True. Minimum = False, Maximum = True.

WildSpawns = Whether or not to spawn wild Ranked dinos.
---Default = True. Minimum = False, Maximum = True.

SpawnRate = The rate of Ranked Spawns. 1 in Every (Number).
-Setting this to 5 is 1 in every 5 is Ranked. Setting to 50 is one in every 50 is Ranked.
---Default = 20 (1 in 20). Minimum = 10 (1 in 10), Maximum = 100 (1 in 100).

RankedLoot = Whether or not wild ranked dinos will drop supply crate loot.
---Default = True. Minimum = False, Maximum = True.

DestroyerTimer = How often, in MINUTES, a Destroyer event will happen.
---Default = 60 (1 hour). Minimum = 60 (1 hour), Maximum = 1440 (1 day).

DestroyerSpawns = Whether or not to enable wild or tamed Destroyers.
---Default = True. Minimum = False, Maximum = True

DestroyerStats = The stat multiplier for wild Destroyer Spawns
-This multiplier effects stats, exp rewarded, loot quality, essence chance.
---Default = 20 (20x). Minimum = 10 (10x), Maximum = 50 (50x).

b]DestroyerTier[/b] = The effective Tier of the tamed Destroyer Rank
-The TierKills and StatMultiplier will both apply to this.
-Example: TierKills of 100 and DestroyerTier of 50 will require 5,000 kills.
-Example: StatMultiplier of 1.00 and DestroyerTier of 50 will give 50x stats.
---Default = 20 (20x). Minimum = 10 (10x), Maximum = 50 (50x).

LeaderboardKey = Which F key to use for the leaderboard.
-ONLY use the number for this setting. Do not use the F.
---Default = 2 (F2). Minimum = 1 (F1), Maximum = 12 (F12).

AdminOnlyLeaderboard = Whether or not viewing the leaderboard requires "Admin".
---Default = False. Minimum = False, Maximum = True

DestroyerNumber = How many wild Destroyers can be in the game at one time.
---Default = 3, Minimum = 1, Maximum = 10.

WildBlacklist = Classes of Tames to blacklist from spawning with Rankings
---You MUST use Dino CLASSES for this, separated by comma (No spaces).
---EXAMPLE: Para_Character_BP_C,Raptor_Character_BP_C

DestroyerBlacklist = Classes of Tames to blacklist from spawning as Destroyer.
---You MUST use Dino CLASSES for this, separated by comma (No spaces).
---EXAMPLE: Para_Character_BP_C,Raptor_Character_BP_C

TamedBlacklist = Classes of Tames to blacklist from gaining the counter/ranks.
---You MUST use Dino CLASSES for this, separated by comma (No spaces).
---EXAMPLE: Para_Character_BP_C,Raptor_Character_BP_C

KillBlacklist = Classes of Tames to blacklist from providing kill counts when killed.
---You MUST use Dino CLASSES for this, separated by comma (No spaces).
---EXAMPLE: Coel_Character_BP_C,Salmon_Character_BP_C

TamedWhitelist = Classes of Tames to whitelist for Kill counter/ranks.
---ONLY these classes will gain the kill counter. Recommended left BLANK.
---You MUST use Dino CLASSES for this, separated by comma (No spaces).
---EXAMPLE: Para_Character_BP_C,Raptor_Character_BP_C
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Spawn the Ranking Gun:
cheat giveitem "/Game/Mods/CombatTrainer/RankingPistol/BP/PrimalItem_WeaponRankingPistol.PrimalItem_WeaponRankingPistol" 1 0 0 false

Force a Destroyer spawn:
cheat ScriptCommand Destroyerspawn