Guild Wars 2

How are the allies effected by Shouts selected by the game? Party members? Range? Random?

Pure of Voice affects those same allies as the shouts? So if no conditions, no boon either.

Same for Soldier runes?

So, if from 10 allies around you 5 have conditions on them and you use a shout with the above trait and runes what happens? Is the worse case scenario such that you just boon the 5 guys without any conditions and have no use of PoV and runes and leave the 5 unlucky allies just to suffer with the conditions on them?

Or how does this work? Separately?

It probably works normal targeting regardless of conditions; party> closest > anyone else in range