This insert is for the Eastern/Western Empires. It's a remix/largely inspired by the great insert from Fabmaszter: https://www.thingiverse.com/thing:5354379. However, I like to have my cards sleeved, so I needed to review everything.
I also used this great unit token holder from marekp95 found on BoardGameGeek: https://boardgamegeek.com/filepage/284955/unit-token-holder.

You will need to print:

• 4 Advancement Holders
• 9 Player Trays and Player Tray Lids
• 3 Token Trays
• 2 Trays 3, Trays 3 Mid, and Trays 4

All the rest is one of each:

• OOP Tokens
• Resource Holder
• Sequence Token

I use Sleeve Kings sleeves, and not all advancements can be sleeved.
Here's how I organize it:

• I sleeved one of each, which I put aside.

Then, based on the tiers, I sleeved fewer and fewer:

• First tier: 6 sleeved + 2 unsleeved
• Second tier: 4 sleeved + 4 unsleeved
• Third tier: 3 sleeved + 8 unsleeved

Then to sort them in the tray I did the following:

• In the first tray, I put all the ones put aside + all the unsleeved ones from the first tier.
• In the second tray, all the sleeved cards from the first tier.
• In the third tray, all the second tier (all the sleeved cards, then all the unsleeved cards).
• In the fourth tray, all the third tier (all the sleeved cards, then all the unsleeved cards