with one exception, all the monsters you listed are significantly above the level at which you'd learn Shatter
in any case, it's a matter of concern. While it has great utility use against nonmagical objects (it did break the party out of being sealed in mad scientist tubes), its actual damage rules are lacking for application
Shatter is the SLA of the pitborn variant of tiefling and based on their other abilities they're built around being effective at breaking constructs
I suppose I'm not likely to get the developers to weigh in on this
maybe I'll just use it to sunder robots' leg joints or something
I have seen a little debate about the effectiveness of Shatter in combat but never anything concrete.
The spell does 1d6 sonic damage per caster level (max 10d6 ) against crystalline creatures, but as far as I can tell there is not a single creature with crystalline type, subtype, or quality anywhere throughout the bestiaries. There are barely any with implications of crystal in their name.
I've argued for shatter affecting stone and metal constructs as stone and metal have crystalline atomic bonding structures, and the GM argues RAW in spite of not a single instance of usefulness having shown itself
The construct traits certainly allow for being affected if they're crystalline, as the immunity to fort save effects is negated if the effect affects objects, which Shatter does.
We're in Numeria now, lots of robot constructs, which leads to the question:
Does Shatter work against constructs? Or is this a spell with next to zero applicability?
I've read that there are two types of claw attacks in PF:
A singular "claws" attack gets you one attack roll and one damage roll
A "2 claws" attack which gets you two of each.
But which would a catfolk get when they take the cat's claws trait?
The wording in the Advanced Race Guide is as follows:
Cat’s Claws: Some catfolk have stronger and more
developed claws than other members of their race, and
can use them to make attacks. Catfolk with this racial trait
have a pair of claws they can use as natural weapons. These
claws are primary attacks that deal 1d4 points of damage.
This racial trait replaces natural hunter.
Between the use of "pair of claws", "natural weapons" (plural), and "primary attacks" (plural) it seems to indicate that the 2claws attack would be the one to use.
However, as "2 claws" is never directly indicated and there is a lack absolute confirmation after the damage value (the word "each" might be nice), it is still open to interpretation as the singular claws type of attack.