
breithauptclan |

Well, here it will get answered from a rules perspective.
So yes, a Witch with a 14 STR could take Mauler dedication. Then after paying off the dedication with a couple more Mauler feats, could take Staff Acrobat dedication using any of the weapons that they now have proficiency with.
The Human feat Multitalented wouldn't help with that since Staff Acrobat isn't a Multiclass Archetype.
Similarly shenanigans with Ancient Elf won't help since neither archetype is a Multiclass Archetype. Plus, Ancient Elf wouldn't help with when you could pay off the first archetype.
So the earliest you are likely to get the Staff Acrobat dedication after taking Mauler would be level 8. If you don't really need the feats from Mauler, you might consider just taking a general feat for weapon proficiency. Or just using the simple 'staff' weapon that basically every class except Monk gets automatically.
* Actually, even Monk gets proficiency with a staff. They just can't use Monk unarmed abilities with it. So no flurry of blows with the staff by default.