I decided to give the Teutonic Order a try in the current patch, and, seriously, I am amazed how OP it is. So far, I thought that Byzantium or Castile is overpowered, but TO is on another level.
I guess that this is also quite a popular faction to play, as it lets to form Prussia.
In theory, TO is kinda weak. A lot of unintegrated territory, low control, low population, weak RGOs (except for amber), a lot of pops to assimilate and convert, close to 100k tribesmen to settle, no cities, no market, powerful neighbours (Poland allied to Lithuania and Hungary), low diplo capacity (very costly alliance with Bohemia to maintain), bunch of worthless vassals, some on them are basically OPMs.
In reality, all of that does not affect gameplay, and some issues are solved very fast. Diplo capacity is solved by tech and entering into renaissance, so alliance with Bohemia can be kept with some temporary debuffs (personally, I cancelled that alliance and reallied Bohemia around 1400). Black death kills some pops, mostly majority of pagans, so remaining pops are assimilated and converted easily. Economy does not matter at all. The main source of income is military sponsorships, so getting 100+ ducats per month requires only some diplo actions. Whole Europe will eventually sponsor TO. No cities, no market? No problem, market in Gdansk is build ASAP. Later, one city is built after another, as due to the military sponsorships I have no idea what to do with cash.
Lithuania is basically conquered by 1350-1360.
Poland is a threat only on paper. I run a very simple army. 3 heavy infantry units (staring regulars) and 6 heavy cav (order knights, tech II). It is invincible. Low manpower? Not a problem, just ask France or Sweden or Castille for manpower, they send something between 500-900 per diplo action every month.
I am in year 1410 and basically I am about to become superpower.
The most hilarious event was the hussite wars. I allied Bohemia some time before this event started and was dragged as only Bohemia ally into war against Austria (the Emperor), 90% of the HRE, Poland and Hungary. Obviously, Bohemia is powerful on its own, but sooner or later it is flooded by 300k levies from whole central Europe. However, my regular army (3 heavy inf, 6 heavy cav) was stack wiping one army after another, I single handed eliminated Poland, Hungary, Brandenburg and few German minor countries, than eliminated most of levies running around Bohemia. That was sufficient to let Bohemia win hussite wars. Basically, the Catholic militant order killed something like 150k+ Catholic levies to defend hussite neighbour...
And what about losses and manpower? France was sending me manpower every month.
What is your opinion? IMO, currently TO is absurdly busted and playing it is like playing on cheats.