I 'll let you to the pathway leading to Emperor..
The event is easy. with lando sth biggs ready, you need just 2 random guys to fill the squad.
1. farm ezra or whatever 8 energy rebel character . you will certainly finish him in time. 2 refresh = 120+120+45+120=405energy. yes this math is right. divide by 8 it's roughly 50 attempts. even if your drop rate is as terrible as 20%, that is 10 shards a day. 8 day farm at the worst.
2. in squad arena shop finish sthan obviously
i have no idea of your rank but you get 200 from daily mission. factor that in your calculation. if your han is 0/100, and if your rank earns 600 token a day, 600+200=800token =10 shard a day. 10 day farm.
3. in gw farm bohdi.
Edit: actually, no. assuming he is at 0 shards it will take 330÷15=22days
4. in cantina token store farm whatever rebel in there that is closest to 7*. this is just failproof excess farming
Edit: this is not failproof because you can't get bohdi. it all comes down to whether you can finish chopper in time.
in 8 energy node you earn 13 token.
you will spend 405 energy
so that earns 405÷8×13 token
divide it by 400. multiply by 5.
that is 8.xx and that is the average number of shards you farm thru cantina shop. daily.
multiply the figure by remaining days. roughly 10 days left.
8x10=80
if that figure is more than the remaining shards for chopper you are good.
but you need 30+85+100=215shards..
so you won't make chopper in time.
aim for 6 star
maybe you should use arena token for ackbar to make him 6* if that is possible.
Edit:just found your zeb is 3*. that is 50~79 shards.you need 251~280 shards. takes 17~19 days. that is not possible.
but for 6*, you need 151~180 shards.
that takes 11~13 days. possible if your zeb is not 0/30.
conclusion: ezra from cantina
zeb from gw
7* is impossible this time around. aim for 6*