The guy farmed out Guderian, who starts with panzer leader and trickster,doesnt seem efficient.Also even if they hold back their traits that doesnt explain how they get 3-5 levels from spain.
Getting trickster(not for Guderian obviously,he starts with it) is a pain because the battlefield conditions for it are rarer and dont last long, because the multiple combat penalty,so you will likely get other traits before trickster which further slows down the already slow progress towards trickster.
How does division width affect xp gain?Is 40w better or same as 20w for xp gain?
I kinda know the theory, but when i try to farm out super generals i fail every single time.
The image linked in the OP is from a modded game. Who knows what was changed.
Grinding Guderian
isn't efficient. It
isn't the meta. The generals to grind for Germany are Dietrich and Kesselring. Reckless isn't good for a general, because of the increased wounded chance, but getting wounded doesn't matter so much for a field marshal. The extra attack pips from reckless and brilliant strategist and armor officer make Dietrich the leader with the highest attack skill weight of all German generals, so he's your best bet for field marshal. Kesselring also has pretty high attack pip weight, but more importantly has cautious to reduce his chance of getting wounded.
Trickster is a pain. Which is why it should be the first you grind out. It's much easier to do with a player Spain setting up a static front line for you to be able to attack several provinces from multiple flanks. Preferably in the northeast, to be able to grind on forests and hills to the north of Barcelona, and finally to grind on the city itself when you're close to whichever other terrain traits you want. By grinding on multiple terrain types, you delay gaining enough xp for any of them to overcome trickster xp. Once you have ~495/500 xp toward trickster, you stop attacking from multiple flanks. And remember to keep your Spain from attacking into your tiles as well.
The way to get three levels in Spain is to send as many volunteers as you can, in Natl. Spain that should be 7. They should have as many battalions as possible, because that also affects xp gain. They should also have relatively high attack, preferably 4x the Rep. Spanish divisions' attacks. So the optimal division to send is 20-0 with support arty and engineers. Or 17-2, one less battalion but more attacks. Stop attacking every couple days, and restart the battle because xp gain is reduced by the ongoing length of the battle up to 30 days.