I've also always thought that upped hope shield is better than unupped in most situations.
The quanta cost barely comes up for me anyway, if you have 7 quanta only and you need a shield this turn or you're dead, you probably have very few RoL out, which is only really going to save you against unupped life rush or something, so having the +1 DR for 1 extra cost would probably be better in the long run as it's at these early stages in the game where +1 DR is monumentally huge.
An interesting alternative is to have a few upped a few unupped, it's luck reliant that you get an unupped for when you have 7 quanta, but it gives you the possibility to play the better one asap, and if you do play the weak shield, it also gives you the opportunity to upgrade halfway through the game, if you survive that long.
I've ran Dragon's deck -1 frac -2 tower +1 hope +1 purify against plat with decent results. (never done before, but I'd un-up 2 of the hopes in future :p)