Since it looks like I'm going to fall short on Darth Revan this time around (frikkin Carth!), I want to make certain I get Threepio unlocked all the way. I maybe overdid it with the Zetas but I was trying to make up for the fact that I didn't think it likely to get to Gear 12 on these little guys.
I will have 4/5 characters at least 7*, and Gear 10 (starting towards Gear 11/12) and I would likely have Carth done had the event been closer to July. But alas, he's sitting at 5* with 62 shards. As it stands, I may get him halfway there by the time the event is done. Oh well.
Needless to say mate, you’re over-prepared. Just hit auto and enjoy your 7 star threepio.