Schwartzring is d definitely correct with point #2: I messed that one up. You should do the 16 energy node only.
Thanks, Schwartzring! I hate to steer someone wrong.
As for Bastila/fleet, well, I actually expect that with the OP's fleet that they're going to be farming Basti for at least a little while, but thinking of her as a higher priority is totally fair.
As for the OP's question:
I've been using my regular energy so far is for getting gear for my genosians. Is it better to spend it on shards for more characters following this plan?
Yes. Regular energy for shards, not gear. There will come a time when that priority switches, but it's a long time in the future.
Your most important source of gear is not regular energy, but Raids.
That leads me to another tip: You have to get yourself in a good guild. A good guild is 50% of your success in the game. There's a lot you can do on your own, but without a guild you'll never get the progress you should.
You need a guild that's playing and beating Heroic STR, not tier 6, Heroic.
You need a guild that is simming both HAAT and Heroic Rancor (do not worry about Rancor Challenge Tier right now).
You need a guild where the officers have a good ability to plan strategies and encourage players to get the most out of Territory Battles.
You need a guild that either wins 55%+ of it's Territory Wars **or** that makes it explicit that they're going for specific teams and goals in Territory Battles (it's hard to be good at both at the same time, so if you have a guild that picks one and works on it, it's fine if the other isn't quite as good).
And, finally, you need a guild that gets more than 25,000 raid tickets per day.
In exchange, you'll have to offer something, but there are a lot of guilds that will take a player who is motivated to get better and gets their 600 tickets/day. My guild is 290Mgp and we still have a couple players in the 3M gp range. Obviously 3M times 50 guild members means if they were average for their guild, they'd be in a guild with 150M to 175M gp - more than 100M gp less. But these are good, friendly folks who care about getting better and will work on the guild priority teams when the officers set certain goals as important. We love 'em and you can't make us get rid of 'em even if you're offering to take their spot with an 8M gp roster.
If you want advice on how to find a new guild, LMK & I'll try to help. I've written before about how to do that.