In /join collection, there is an NPC named Malorie. She has a set of quests where you trade a Super-Fan Swag Token A for 5000 Rep gain for a set of factions.
The factions available for this method are:
Arcangrove
Chaos
Chronospan
Doomwood
Dwarfhold
Embersea
Etherstorm
Evil
Good
Horc
Lycan
Mythsong
Northpointe
Ravenloss
Sandsea
Skyguard (Member-Only)
Swordhaven
ThunderForge
Troll
Vampire
Yokai
/join terrarium and talk to Kid Drakath.
Accept the quest For Science! from him.
/join collectorlab, walk to the second screen, and kill the enemies there.
Collect the Super-Fan Swag Token C until you have 500 total.
Go back to Malorie in /join collection and open her Merge Shop. Merge all of the Super-Fan Swag Token C into Super-Fan Swag Token B, and then merge all of them into Super-Fan Swag Token A
Each Super-Fan Swag Token A can be turned in for Malorie's Quests to gain 5000 Rep. You can also use the methods for Ways to Buff Rep Gain on the main page.
With 2× the Rep gain, you will need 31 tokens to achieve Rank 10.
With 4× the Rep gain, you will need 16 tokens to achieve Rank 10.
With 5× the Rep gain, you will need 13 tokens to achieve Rank 10.
With 6× the Rep gain, you will need 11 tokens to achieve Rank 10.
Hence, using Boosts is very good for saving time.
You are often better off using other methods.
The best way to obtain Super-Fan Swag Token A is to do a Daily quest for Friendship in /join battleodium
You must achieve 6 Hearts of Friendship with Loremaster Maya, which will reward you with a single Swag Token A every day that you maintain the Friendship level.
The best things to gift her are Apples, Chrysanthemums, and Sapphires, each of which Increases Friendship status by ¾ hearts when gifted.
Apples are dropped by Darkbark, Maulignant, and Vileture.
Chrysanthemums are dropped by Carcass Creeper, Gloombloom, and Widowing.
Sapphires are dropped by Diemond, Shadeling, and Twilighteeth.
For Non-Members, it is even more vital that you stock up on tokens and Rep Boosts, because it cuts down on the amount of days you have to wait significantly.
With 2× the Rep gain, you will need 31 tokens (days) to achieve Rank 10.
With 4× the Rep gain, you will need 16 tokens (days) to achieve Rank 10.
With 5× the Rep gain, you will need 13 tokens (days) to achieve Rank 10.
With 6× the Rep gain, you will need 11 tokens (days) to achieve Rank 10.