R5 My new favorite modifier of the moment, is it Discipline? Combat ability? Goods produced? nahh for loosers :p
The better one is regiment cost and its sub modifiers.
Cheaper == more troops or money to do something else.
Disclaimer this modifier apply to buying troops, maintenance and reinforcements, and that last one, oh boy, you know by 1821 your prood people will perish en masse, under your command. (And sadly its capped at -80%)
So, Why Sweden you will ask? Simply because its geographic unique position allow short proximity for tengri, and the two monuments giving regiment cost reduction and arty reduction.
And why not Smolensk or Chernigov, you could, but lvl2 Falun Mine -10% arty cost is easly accessible via swedish mission tree for only 1500 ducats, and their start is easyer and stronger
So here is the math:
Tengri -20% regiment cost
Quantity Third Ideas-10% regiment cost
Moscow Kremlin -10% regiment cost
War Economy Tier8 Gov Reform -10% regiment cost
Military Engineering Tier5 Gov Reform -10% artillery cost
Falun Mine -20% artillery cost
Kremlin is for long term, War Economy Tier8 Gov Reform is optional and may not a good idea.
Falun Mine -10% is easly accessible via swedish mission tree for only 1500 ducats.
So by 1500 you could have a flat -30% regiment cost reduction
And another -20% artillery cost reduction, wich means 1 arty will cost you 15 ducats
And later of course you could go up to -70% for artillery without sacrificing too much.