In current World War environment, Shooter + Artillery is the most effective combo, and it is easy to max up in university.
Though there is some voice mentioned that factory troop is getting closer, but It still less than 5% shares.
And per my experience, Shooter + Artillery Combo is still much better to deal with max level defense.
Take a simple assumption that 70 shooters in the combo
VS Korean:
70 Green Jacket VS 70 Republic Rifle. People find that though there is some difficult to deal with tank, but Green Jacket got a better change to survive, and deal better to max level defense.
VS Chinese:
70 Green Jacket VS 70 People' Rifle. Obviously +1 range is far better than 5% DPS bonus
VS Roman:
70 Green Jacket VS 85 standard Rifle, 70 Green Jacket > 70 Republic Rifle(1.4*70) > 85 Standard Rifle(1*85) ,
VS France:
France got 6 more Space from Alliance Army, it is even worse than Roman (15 Space)
VS German:
German is a funny Nation. need to calculate carefully.
Teutonic Fury: from the description, it provide 15% DPS for all troop, but the Bonus is apply to basic DPS. that mean more research, lease significant the bonus
It become 10% bonus when finish University, 8% for Full Coal + University research.
The bonus make German got the best Howie, With full buffed, it able to bring down building with HP lower than 4000 in one shot, while other nation can only bring down building with HP lower than 3700. Which means for Building with HP 3700 - 4000, German is double effective, but not much difference for Building outside the range.
As result, German doing better when facing defense not yet max up (said level lower than 220), but British still better in handling lv220+ bases