Claw Damage for Wildshape + Girallon's Blessing?

[Bob5th]

If I wildshape into a Brown Bear I have 2 1d8 claw attacks. If I then cast Girallon's Blessing on myself if gives me and extra set of arms. It also gives me 4 1d4 claw attacks.

I'm trying to figure out how this works together. Do the 1d4 claws replace my 1d8 claws?

I see 3 basic options for how this could work.
4x 1d8 Claws
or
4x 1d4 Claws
or
2x 1d8 Claws (primary arms)
2x 1d4 Claws (secondary arms)

Also since I am a large creature as a Brown Bear would the claws be 1d4 or 1d6?

Thanks for any help you can give. I playing my first druid and she is level 8. It's fun but all this wildshaping stuff is complicated but I think I've got the basics down.

 

[Drowbane]

2x 1d8 Claws (primary arms)
2x 1d6 Claws (secondary arms)

Your bear form is large, not medium. Spells and effects such as Girallon's assume medium size, adjust from there if you're not medium.