Best Muscovite Tsardom units?

[Isbiten]

This is my first playthrough and I'm having some problems.
Now, I have around 130k and was hoping to get myself a really nasty army.
What I wanna do is take over a castle/city .

Now, I'm loyal to Muscovite Tsardom and as I understand I can now only hire their units (as well as mercenaries).
So, what are the best units that I can choose from and what is a good combo to take over cities?

 

[Gambino]

mercenaries from mercenary camps, use riflemen with best melee weapons and best rifles and shields and best armor etc etc and without horse and go seige cities with them

boyar is also good for heavy infantry, Marksman for light musketeers, moscow reiter is a cavalry but useful for seige campaigns because he is good in seiges and he has a pistol and if theyattack you before you seige you will be able to use him as cavalry so 2 in 1