Thanks for all the answers!
About the Jedi farming for 3* D Mods; Yes, I just now realized it'd be worthless, since I can barely pass the 2*, and would need some serious investments in my Jedi to get to 3*, which won't happen right now.
I'll go for Health Mods then, TFP would be a future farm, if I ever need him.
About the IG-88: Now I see his importance (really don't think I'll be able to keep him and Chewie alive throughout the Mod Challenge, but with him as a 7* it might be possible), but right now I'm with A LOT of cash (almost 10mil with no use atm) and the Heist is so easy (I just AB it) and I'll only be able to play the next Heist in almost 30 days (the amount of time I'll need to reach lvl. 80). I might just push Windu to 5* (he's 20 shards away anyway) and then go for Tarkin 5* and then IG-88. But I'll keep in mind about Sidious, might go for him after IG-88 is maxed (or maybe after Tarkin is 7* too, since I'll take me a long time to zeta Maul and have another 20 zetas for Sidious).
Will gear Wedge and after him it'll be Biggs. I could buy the cuffs from the fleet shipments but I think they're too valuable for some toon shards and ship shards.
Atm I'm farming JKA from Hard Nodes....
And one last question: Who should I farm in Cantina Shipments after QGJ is 7*? Ahsoka to 7*? Fives? And atm I'm using all my GW Tokens for ships, should I keep it that way until I have all my ships 5* for the Zeta Challenge or should I start farming someone? Maybe Datcha for the CD Mod Challenges?