It is very tough to completely catch up, and by that, I mean getting everything to 7*...everything to g12 is a whole different ballgame. For me, it seems anytime my total remaining shard count gets below 3,000, they add another character or three. As of today, I was at 2,758 left for toons and 800 for ships. So now the shard total goes up by 330 for Shaak Ti (or really 280 due to the event).
For your toons, I would keep working on the Darth Revan toons since you look to be close with those. I would also get that last star on Bossk. Your next big project would be FO to get BB-8 to 7* and then work on the toons needed for JTR.
