1. The commander choice is tied heavily to game mode. 1v1 commanders are different than 4v4. 1v1 commanders give early game advantage or have vehicle call ins so you do not have to tech. Who ever gets vehicles out first will do well. 4v4 commanders require recon and artillery to counter the artillery your enemy will be erasing your army with late game.
2: Many pros suggest running bulletins for units that you start with in the game. Units you will be making and using the entire game. Usually mainline infantry. When I see players running all late game tank bulletins I tend to think they are noobs (without using CELO). Running bulletins for late game units that may never be built = not running any bulletins at all.
One exception is SOVIET. Running certain bulletins will tell the enemy which tier you are going to build 1st. So running all penal bulletins says you will not be making Maxims, ZiS, Mortars, etc. So the bulletins give away your strategy.
3: I am the opposite of most people on this site and say 4v4 is the best place to learn. 1v1 the game is over if you make one mistake. 1v1 will make you the better player. So move from 4v4 to 1v1 as your skill increases.
