shard drops odds are really low

My advice is hang in there. Also, @djwarcr you keep saying 10 or 6-10 attempts and only 0-1 shard. Natural refresh is 120 cantina energy a day and at 8 energy per attempt you should be having 15 per day(30 per day with refresh). My second piece of advice is to focus on which hero you want to level. From the numbers it appears you are spreading your attempts out over multiple heroes, which will make the progress feel slow. Even at a 1/15 drop rate you would have gotten 21-42 shards since December (depending on refreshes) if you were focused on GS.