Best Practices: Alchemical Lab Troop Upgrading
The Alchemical Laboratory Troop Upgrading explanatory text is rather mystifying.
(1) Troop upgrading becomes yet another player character evolution path, beside Buildings and Studies?
(2) What are the upgrading best practices?
Raising the 1st troop type the first level raises the cost of all other troop types, or so the text says.
Does it make sense to raise all troop types L1 one level, then keep repeating until all troop types L1's are at level 10, and again repeating until all troop types L2's are at level 10, rinse, repeat?
Or raise one troop's type L1 to 10, then skip to that troop type L6 (at which point you must raise L2-L5 to the first level) and repeat?
[To raise L6 to the 2nd level, do you have to raise L2-L5 to the 2nd level first?]
How do the costs work? I would not want to raise my prime troop type's L1 to 3, to find the cost of all other troop types level one cost has tripled!