My friend plays an Unchained Summoner in Pathfinder Organized Play, and I build a character for them. It's actually possible that I create my own Unchained Summoner two, as I've tried this class already and kinda liked it.
I'd like to maximize overall damage dealt per round. As my Google-Fu shows, most people speaking about Eidolons give them either a lot of Natural Attack or build them for archery. However, I would like to try a (possibly) even more damaging thing.
I'd like to give an Azata several pairs of Limbs (arms) as it progresses, and make the said Azata wield a Greatsword in each pair of limbs. This answer says that there is a special feat for that called Multiweapon Fighting.
The earliest point when this feat can be taken is level 3: you cannot qualify when you are level 1.
Will this actually give a better damage per round than a natural attacks-based build?
Is the same possible with multiple bows used in each pair of limbs?
If it's worth it at some point, does it always stay powerful?
PFS rules are used, hence it's not important what happens after character level 12.