So, for 1v1 games, what commanders are good to bring?
Right now, I'm thinking Spearhead (seems pretty balanced overall and has the Tiger), but I have no idea what else to bring. Any suggestions?
P.S.: I don't have the Mechanized Assault guy, but I could get him if needed and worthwhile.
Against USF
Mobile Defense Doctrine with Puma and PIV Command Tank with heavy T1, T2 works great if you really need those call ins fast. Teching up to T3 is kinda tricky against USF.
If things go better then expected, for example you achieve early map control (which is rarely the case), I recommend any Tiger doctrine, especially Mechanized Assault with Stug E and a Tiger.
Against SU
As you said Spearhead is a great idea (for example against maxims), Assault Support with Strafe, and I like to have a PIV Command Tank Doctrine as well for defensive purposes. I wouldnt recommend Mechanized Assault though.
But after all, I would really take the commanders you like and that you have fun playing with. Picking a doctrine others recommend isn't always the way to go if it doesn't suit your playstyle. It is always nice to see new strategies because the game really lacks some new tactical approaches.