I am in an active guild and do have long term plans to go fro SLKR. I am unclear if they are doing what I need for G12 gear and relics. We seem to rotate between the three on heroic. We do not do the second one though, is that one necessary for what you talk about? There are only a few hard hitters in the clan most are below 85 but all active.
So, I like thhe plan of getting Bastilla team and Geo team and then look to add JKR to that Bastilla team.
After I get all that done then I will start building towards SLKR. There is just so much that has to go into that I feel like it is daunting. But by then I should have a nice set of teams, FO, Empire, Phoenix, Jedi, Geo and probably some lesser teams.