I needed a set of Tokens as well.
It had to be as space-saving as possible, so I took an abstract approach to my tokens.
Going through all encounters and schemes I compiled a list of tokens needed.
Special terrain that needs tokens can only be flipped once, additional special terrain is always an environmental effect.
Strategies
5x 30mm; You will be needing additional tokens per player for Evidence, Claim and Sabotage, as explained later.
1x 50mm
1x 3" by 3"
Special Terrain
4x 30mm
2x 50mm
2x 3" by 3"
I crafted them in two colors, white for strategy, orange for special terrain:
Tokens referencing to a player (evidence, claim, sabotage and schemes) I made double-sided.
One colored side with the faction logo an one white side showing the faction logo as well.
I made 15 of these tokens per player.
For effects like Poison, burning, etc. I opted to use colored dice.