Honestly, I am having a change of heart.
After playing so many RTS and strategy games, I think the Imperial Guard is the model to follow, so infantry should be numerous and be outfit with the cheapest shit, while money should be spent on mechanization i.e. tanks, IFV and self-loading howiztler.
But I also think that the model where special forces/elite infantries are to be mixed in the regular grunts in order to lead and increase effectiveness for the grunts is better than the model where grunts and elites are separated.