Pio - Gren build

This is purely theorical as I've yet to try it, though I wanted some thoughts on it:

I was thinking about a starting pio > gren > pio > gren > pio > gren build to use on Urban maps (such as stalingrad) specifically against USF and con spam/T1 soviet, the idea would be to keep your units in pair, 1 pio, 1 gren, as it's obvious grens would cover the long range damage, while pioneer flank or act as counter initiation for squads that try to close in on grens (like penals and cons, but later on shocks aswell if they are equipped with flamers).

The idea of this build is to make oshteer abit less static and defensive than it is right now (but should still be extremely careful of when and where to engage) as pioneers' damage isn't half bad if they are relegated to a support role for grens, ofc, if needed you can always mix in a mortar or mg.

The first Issue that one could have with this build would probably be how pios scale late game, I personally think they would do fine, repairs are always needed, flamethrowers are great on urban maps and to counter close quarters units and a minesweeper to clear up the soviet's mines aswell as having the map presence to place mines everywhere you want with 3xpios.

It's also intesive munitions wise, so perhaps an appropriate doctrine for it would be needeed.

So any thoughts? Maybe someone tried this before me? How did it go?