Maybe I'll create a tech screen for each suit. And each suits layout will essentially be the same, using the same x and y locations for techs.
Each era screen could have 10 cards in a Celtic Spread and then other techs along the side of the screen (Minor Cards and occult related techs). This way, all the cards will be in the game. Each suit would see all of the Major cards and a mixture of 14 different Minor cards and some constant occult related techs that each suit has to learn...
For example, the wands would see all 22 Major Cards and a mixture of 14 different Minor cards (Ace of Wands, Two of Swords, Three of Pentacles, Four of Cups, ... King of Wands)... and some standard occult-related techs. So let's just say this adds up to be about 50 techs overall for each suit...divided by 4 eras, which makes about 12-13 techs per era for each suit. That's still simple and elegant...
Plotinus, if you are still reading this, I think you created custom tech screens for each civilization, so maybe you can give me some general advice on this? I think you just have to make sure you use the same x and y location for techs, right?
I'll experiment with it and see how it works...
Helpful link I found about this here:
multiple tech trees
Edit: I decided not to mess with multiple tech trees...