If you used mainly colonial troops you have much more power, because you can produced more troops.
The regular troops from era I to IV are for waste, because you can not update this troops to era VIII.
And this depends not on economy, terrain and neighbors.
Only in the time from era I to III it make sense to used the light regular infantry. then you can research the colonial troops level 2 and you can changed your troops from regular to colonial.
Another way is it to use the mercenary troops.
The regular troops from era I to IV are for waste, because you can not update this troops to era VIII.
And this depends not on economy, terrain and neighbors.
Only in the time from era I to III it make sense to used the light regular infantry. then you can research the colonial troops level 2 and you can changed your troops from regular to colonial.
Another way is it to use the mercenary troops.
„Berûche mich, getrûwir got:
Der vatir sende mir dî macht,
daz iz werde vollinbrâcht,
des ich hî gedenke ;
des sunis wîsheit lenke
mîne cranken sinne,
Nikolaus von Jeroschin (1290-1341) Kaplan d. Hochmeisters d. Dt. Ordens
Der vatir sende mir dî macht,
daz iz werde vollinbrâcht,
des ich hî gedenke ;
des sunis wîsheit lenke
mîne cranken sinne,
Nikolaus von Jeroschin (1290-1341) Kaplan d. Hochmeisters d. Dt. Ordens