I know, It's because u skip tier 1 so u don't know where to spend your excessive manpower, building 3rd pioneer is a waste u think so u go with munition cache. Poor thing
I suggest if u really want to do tier 1 skipping, at least save manpower for PG. Building munition cache will also make your engineer lose the time to capture more territory while building it. I am talking about 1v1 that there are many capture points avalible for both team to cap. Therefore, capturing as many points as possible is a key in to gain advantage early in this game.
I bet u did not play 1v1 much, u always play 2v2 3v3 4v4, don't u ? so that you gain resource becuz your team cap them for u. Try to play more 1v1 man, u will know that if u reach the capturing point late, not only u will lose point to enemy but also find out that many good-spot buildings will have conscipt in there too. It will be double hard to take it back.
I've played this strat in 1v1. Out of the 7-8 times I've used it, I've only lost once.
And ultimately, if you go PG -> Scout car, after the scout car is finished (Most russkis, I find don't tech AT nades so your scout car can harrass cons in the first few minutes it comes out quite nicely), you can get your 2nd PG straight away, so I don't see the problem at all!
If you want, check this out. BTW, that's a 1v1
http://www.twitch.tv/hubewa/b/419367724
And also, personally, I disregard anything for 2v2+. If it's fit for 1v1, I will talk about it. Anything fit for 1v1 in COH2 is fit for 2v2s. Anything only for 2v2s tends to be gimmicky at this stage.