Synthesist summoner and weapons

[Derper]

Ok so is the eidolon proficient with weapons the summoner is proficient with since essentially the summoner is wielding them.

[Phasics]

Derper wrote:

Ok so is the eidolon proficient with weapons the summoner is proficient with since essentially the summoner is wielding them.

yep

[Rocky Williams 530]

Derper wrote:

Ok so is the eidolon proficient with weapons the summoner is proficient with since essentially the summoner is wielding them.

The eidolon isn't proficient with anything. It has no skills or feats. The summoner is the one doing everything. He's the "brain", the eidolon is the "brawn".