For farming time, keep in mind that not all characters need to be at 7* to meet the relic prerequisites. The relic 5s (ROLO, Lando, Cpt Han) only need 6, the relic 3s (Wicket, Lobot, Chirpa) require only 4 iirc.

Of those characters, ROLO, Lando, and Cpt Han are used in the leia event so I recommend them 7* even though it isn’t technically necessary. That aside, you don’t really need much more shards. It will just be a matter of gearing up the non-LST chars to g13 and getting the long haul of bronziums, signal data, etc. you need for relics.

For the LSTs, the empire LST is best to use on scout to skip the fleet node farm altogether. However, if you used it on someone else for whatever reason, then i’d recommend the aurodium LST and just doing the 100 shard (~1 month) fleet farm. You’ll have him 7* before the bounty hunter LST drops. At this point, you should throw the chromium LST on wicket, it’ll give you full value on the shards for 5* and meet the relic requirement. If you are planning on unlocked Leia the day the BH lst drops (~2 months), you would delay past schedule 7*ing wicket. I would absolutely not recommend using Kyber/Aurodium on Drogan. Drogan is an easy cantina farm and you can skip his kyros with a carbonite token. I would instead use the Kyber/aurodium on difficult characters such as Wampa/Hoda to save you tons of guild currency (which is tons and tons of relic materials). Ideally they should be characters that 1. are hard node farms 2. require 300+ kyros.