GS and Ackbar is given to you free via the challenges towards unlocking fleet Arena anyway.
It's true, but that has nothing to do with farming. If you're farming that usually means to 7* (or clarified otherwise). If you get it for free, from quest or chromium or even santa, it doesn't matter unless it's a fully 7* unit.
GS, really? As far as I remember I was given Ackbar, Tarkin, Mace.
You get 1 unit from each side, well actually you get shards to unlock basic version of that unit. 10-25 shards (can't remember) - FOTP, CS and GS.
"7) Farm Ackbar in Arena store after STH is 7*. You get a 4* Ackbar from the fleet challenge, so farm another 65 shards. "
Unnecesary clarification. By the time you get 7* STH, you will have ackbar unlocked. So farming to 5* is still valid. I would advise to keep guide clean. Too much unnecesary text will get it messy.
6) In Guild store, just save your coins for later. Maybe you need it for higher gear levels. At level 60, farm Sun Fac.
I still do believe that using all on gear is not the best way. You should try getting at least 1 unit beforehand. Sun Fac shows up rarely in shop and knowing ppl they will just buy whatever gear they need now, even if it's easily farmable from nodes.
As it is your guide is strictly arena oriented. I don't mind that though.