I think trying to farm any character from LS/DS nodes that is not NEEDED for an event is probably not a wise investment in energy at this point.
I'm new to the game, only 2.5 months in, but from what I've seen so far I've made a "fairly" small list of characters to farm from L/D/F-Hard nodes & won't be bothering with anyone else.
1. Early game is Sabine at 60 energy/day to be able to open Phantom later but probably a max of 4* her.
2. As soon as the JKR Nodes open up you devote 80/day to each of them.
3. FO-TP is also on that list & supplement with the rare Fleet Currency Purchase.
4. As some of the above hit 7* then switch over to the DR trio.
5. The Rey/Falcon combo node is also needed once the JKR trio is done.
6. Slave-1 & TAX1 are both solid in Fleet Hards with those Revan 2nd nodes.
7. Finally the BH Ship nodes, Ewoks, & Bosk are a must for the Falcon/Chewie/3PO events.
Outside of the above, I have not found anyone that I will farm & all the rest of my gold & blue energy goes to gear now.
I tried doing to many of the above all at once & had to trim it back.
Now I only do the Fleet/JKR nodes & the DR/Rest/BH nodes are on hold so I can still try for more gear.
I'm sure there is more out there, but so far it seems like only 3-5 characters at a time is all you can do or fall behind on gear. So I mostly skip all of them & just hunt the event required folks, even if that means using a less than perfect choice in a group.
