Really unsure how to allocate resources with my current teams

All heroes are lv. 35.

Light side:

Barriss 4* Gear IV
Eeth Koth 3* Gear IV
Ahsoka 3* Gear IV
JC 2* Gear III
CW Chewie 3* Gear III

Dark side:

Asajj 4* Gear III
Nightsister Initiate 3* Gear III
GS 1* Gear IV
Talia 3* Gear III
FOTP 1* Gear III

PvP:

Barriss, Eeth, Ahsoka, JC/Chewie, Asajj, and Dooku (3* Gear III)

EDIT:

Other honorable mention characters:

Jawa 3* Gear 3, RG 1* G3, HK-47 4* G1, IG-88 3* G1, IG-86 2* G1

So far I've been farming shards for GS in Cantina and Barriss/Ahsoka in Shipments/Arena. I haven't leveled any skills but I've been doing Cantina/Challenges for mats so I can unlock a number of them right now.

Really not sure how to progress from here. Read a few of the guides that recommend GS, Asajj, Sid, and a few others, but I'm still unclear about the "best" progression for me based on where I'm at.

Thanks!