Thanks for the link Byakko, I hadn't even thought of the stat limitation for mauler.
So from what I understand from that thread, we cannot take Improved Familiar with any archetype that modifies speak with animals of its kind because we no longer have the class ability.
Polyglot Familiar grants the ability to speak with animals of its kind, but it is not gained as a class ability, it is a feat. Though it adds the same ability, it does not count for archetypes due to its source as a feat.
There is language in the rules to support this, as class features are specifically called out in the archetype section, and all of the class listings include 'class feature' sections.
Not the answer I was looking for unfortunately, so now I'm back to square one on getting an improved familiar with a nonstandard body to gain hands for using wands, but I appreciate the help.